Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59....
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Generics: Inference & Accommodation
Greg Restall
constructing social hierarchy 2 ·mit · 6 december 2019
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My Aim
To give an account of norms governingour uses of generics, and our inferring,
showing how phenomena of accommodation
can help explain the behaviour of generic judgementsand what we can do with (and to) them.
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My Plan
Motivation & Background
Generics & Inference
Accommodation & Inference
Options for Critique & Reform
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motivation &background
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Problem 1: Generics
Birds lay eggs.
Logic talks are boring.
Mosquitos transmit Ross River Fever.
Cows are food.
Men are aggressive.
Muslims are terrorists.
Greg Restall Generics: Inference & Accommodation 5 of 59
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Problem 1: Generics
Birds lay eggs.
Logic talks are boring.
Mosquitos transmit Ross River Fever.
Cows are food.
Men are aggressive.
Muslims are terrorists.
Greg Restall Generics: Inference & Accommodation 5 of 59
![Page 7: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/7.jpg)
Problem 1: Generics
Birds lay eggs.
Logic talks are boring.
Mosquitos transmit Ross River Fever.
Cows are food.
Men are aggressive.
Muslims are terrorists.
Greg Restall Generics: Inference & Accommodation 5 of 59
![Page 8: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/8.jpg)
Problem 1: Generics
Birds lay eggs.
Logic talks are boring.
Mosquitos transmit Ross River Fever.
Cows are food.
Men are aggressive.
Muslims are terrorists.
Greg Restall Generics: Inference & Accommodation 5 of 59
![Page 9: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/9.jpg)
Problem 1: Generics
Birds lay eggs.
Logic talks are boring.
Mosquitos transmit Ross River Fever.
Cows are food.
Men are aggressive.
Muslims are terrorists.
Greg Restall Generics: Inference & Accommodation 5 of 59
![Page 10: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/10.jpg)
Problem 1: Generics
Birds lay eggs.
Logic talks are boring.
Mosquitos transmit Ross River Fever.
Cows are food.
Men are aggressive.
Muslims are terrorists.
Greg Restall Generics: Inference & Accommodation 5 of 59
![Page 11: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/11.jpg)
Generic judgements. . .
Fs are Gs
... are pervasive.
... are basic.
... behave very strangely.
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Generic judgements. . .
Fs are Gs
... are pervasive.
... are basic.
... behave very strangely.
Greg Restall Generics: Inference & Accommodation 6 of 59
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Generic judgements. . .
Fs are Gs
... are pervasive.
... are basic.
... behave very strangely.
Greg Restall Generics: Inference & Accommodation 6 of 59
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Generic judgements. . .
Fs are Gs
... are pervasive.
... are basic.
... behave very strangely.
Greg Restall Generics: Inference & Accommodation 6 of 59
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Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
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Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.
Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
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Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
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Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.
True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
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Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
![Page 20: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/20.jpg)
Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.
Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
![Page 21: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/21.jpg)
Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
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Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.
Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
![Page 23: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/23.jpg)
Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
![Page 24: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/24.jpg)
Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
![Page 25: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/25.jpg)
Mosquitos transmit rrf — what does this mean?
All mosquitos transmit rrf.Some don’t.
Some mosquitos transmit rrf.True, but some mosquitos don’t, and we won’t say “Mosquitos don’t transmit rrf.”
Most mosquitos transmit rrf.Most don’t.
Normal mosquitos transmit rrf.Male mosquitos don’t. �ey aren’t normal?
Mosquitos are the kind of thingthat transmit rrf.
�ey’re also the kind of thing that doesn’t—e.g. males, or those in Africa.
Greg Restall Generics: Inference & Accommodation 7 of 59
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Background 1: “Inferentialism”, broadly construed
I inferentialism: an approach to semantics that takesmeaning to centre on norms of inference.
I normative pragmatics: an approach to semantics thattakes semantics to centre on norms of use (perhapsincluding inference, perhaps not).
I My recent research concentrates on the connectionsbetween normative pragmatics and logic, via proof theory.
Greg Restall Generics: Inference & Accommodation 8 of 59
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Background 1: “Inferentialism”, broadly construed
I inferentialism: an approach to semantics that takesmeaning to centre on norms of inference.
I normative pragmatics: an approach to semantics thattakes semantics to centre on norms of use (perhapsincluding inference, perhaps not).
I My recent research concentrates on the connectionsbetween normative pragmatics and logic, via proof theory.
Greg Restall Generics: Inference & Accommodation 8 of 59
![Page 28: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/28.jpg)
Background 1: “Inferentialism”, broadly construed
I inferentialism: an approach to semantics that takesmeaning to centre on norms of inference.
I normative pragmatics: an approach to semantics thattakes semantics to centre on norms of use (perhapsincluding inference, perhaps not).
I My recent research concentrates on the connectionsbetween normative pragmatics and logic, via proof theory.
Greg Restall Generics: Inference & Accommodation 8 of 59
![Page 29: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/29.jpg)
Background 1: “Inferentialism”, broadly construed
I inferentialism: an approach to semantics that takesmeaning to centre on norms of inference.
I normative pragmatics: an approach to semantics thattakes semantics to centre on norms of use (perhapsincluding inference, perhaps not).
I My recent research concentrates on the connectionsbetween normative pragmatics and logic, via proof theory.
Greg Restall Generics: Inference & Accommodation 8 of 59
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Problem 2: Pejoratives
An inferentialist analysis of pejorative predicates:
x is German
x is Boche
x is Boche
x is cruel
Using Boche in this way encodes a substantialconnection between being German,
and being cruel.
What does Boche mean, when it’s used like this?
Greg Restall Generics: Inference & Accommodation 9 of 59
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Problem 2: Pejoratives
An inferentialist analysis of pejorative predicates:
x is German
x is Boche
x is Boche
x is cruel
Using Boche in this way encodes a substantialconnection between being German,
and being cruel.
What does Boche mean, when it’s used like this?
Greg Restall Generics: Inference & Accommodation 9 of 59
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Problem 2: Pejoratives
An inferentialist analysis of pejorative predicates:
x is German
x is Boche
x is Boche
x is cruel
Using Boche in this way encodes a substantialconnection between being German,
and being cruel.
What does Boche mean, when it’s used like this?
Greg Restall Generics: Inference & Accommodation 9 of 59
![Page 33: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/33.jpg)
Problem 2: Pejoratives
An inferentialist analysis of pejorative predicates:
x is German
x is Boche
x is Boche
x is cruel
Using Boche in this way encodes a substantialconnection between being German,
and being cruel.
What does Boche mean, when it’s used like this?
Greg Restall Generics: Inference & Accommodation 9 of 59
![Page 34: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/34.jpg)
Problem 2: Pejoratives
An inferentialist analysis of pejorative predicates:
x is German
x is Boche
x is Boche
x is cruel
Using Boche in this way encodes a substantialconnection between being German,
and being cruel.
What does Boche mean, when it’s used like this?
Greg Restall Generics: Inference & Accommodation 9 of 59
![Page 35: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/35.jpg)
Pejorative uses
�is isn’t restricted to pejorative expressions.People can use standard expressions pejoratively, too.
x is a talk on proof theory
x is a logic talk
x is a logic talk
x is boring
Are these inferences a part of the meaning
of the pejorative expression?
Greg Restall Generics: Inference & Accommodation 10 of 59
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Pejorative uses
�is isn’t restricted to pejorative expressions.People can use standard expressions pejoratively, too.
x is a talk on proof theory
x is a logic talk
x is a logic talk
x is boring
Are these inferences a part of the meaning
of the pejorative expression?
Greg Restall Generics: Inference & Accommodation 10 of 59
![Page 37: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/37.jpg)
Pejorative uses
�is isn’t restricted to pejorative expressions.People can use standard expressions pejoratively, too.
x is a talk on proof theory
x is a logic talk
x is a logic talk
x is boring
Are these inferences a part of the meaning
of the pejorative expression?
Greg Restall Generics: Inference & Accommodation 10 of 59
![Page 38: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/38.jpg)
Background 2: Semantics, Metasemantics and Practice
I semantics: accounts of the meanings of particularexpressions.
I metasemantics: an account of the space of possiblemeanings, and the different ways expressions can gettheir meanings.
I practice: Metasemantics, in particular, can be apartner for clarificatory and emancipatory possibilities forrevising our languages and our practices.
Greg Restall Generics: Inference & Accommodation 11 of 59
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Background 2: Semantics, Metasemantics and Practice
I semantics: accounts of the meanings of particularexpressions.
I metasemantics: an account of the space of possiblemeanings, and the different ways expressions can gettheir meanings.
I practice: Metasemantics, in particular, can be apartner for clarificatory and emancipatory possibilities forrevising our languages and our practices.
Greg Restall Generics: Inference & Accommodation 11 of 59
![Page 40: Generics: Inference & Accommodation · Greg Restall Generics: Inference & Accommodation 7 of 59. Background 1: “Inferentialism”, broadly construed I inferentialism: an approach](https://reader033.fdocuments.us/reader033/viewer/2022053003/5f077bcb7e708231d41d3506/html5/thumbnails/40.jpg)
Background 2: Semantics, Metasemantics and Practice
I semantics: accounts of the meanings of particularexpressions.
I metasemantics: an account of the space of possiblemeanings, and the different ways expressions can gettheir meanings.
I practice: Metasemantics, in particular, can be apartner for clarificatory and emancipatory possibilities forrevising our languages and our practices.
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generics &inference
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Truth Conditions?
�ere are many accounts ofthe truth conditions of the generic
Ks are F
Any adequate account is very complicated.
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Truth Conditions?
�ere are many accounts ofthe truth conditions of the generic
Ks are F
Any adequate account is very complicated.
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An example, from Sarah-Jane Leslie
Sarah-Jane Leslie “Generics: Cognition and Acquisition,”Philosophical Review 117:1 (2008), 1–47 — page 43.
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The Approach I’ll Explore
We don’t understand a generic byfirst grasping its truth conditions.
We learn to use generics by learningnorms for how to use them.
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The Approach I’ll Explore
We don’t understand a generic byfirst grasping its truth conditions.
We learn to use generics by learningnorms for how to use them.
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The Modal Parallel
I take it that this sort of account makes sense of how weunderstand modal terms like possibly and necessarily.
“Possibly p” and “Necessarily p” have truth conditionsexpressed in terms of possible worlds,
but we don’t learn the concepts of possibilityand necessity by way of
some prior access to possible worlds.
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The Modal Parallel
I take it that this sort of account makes sense of how weunderstand modal terms like possibly and necessarily.
“Possibly p” and “Necessarily p” have truth conditionsexpressed in terms of possible worlds,
but we don’t learn the concepts of possibilityand necessity by way of
some prior access to possible worlds.
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To say that a state of affairsobtains is just to say thatsomething is the case; to saythat something is a possiblestate of affairs is just to saythat something could be thecase; and to say thatsomething is the case ‘in’ apossible state of affairs is justto say that the thing inquestion would necessarily bethe case if that state of affairsobtained, i.e. if something elsewere the case...We understand ‘truth in statesof affairs’ because weunderstand ‘necessarily’; notvice versa.
— Arthur Prior,Worlds, Times and Selves (1969)
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But what do they mean?
�e problem remains:
What are the norms governing generics?
How do we understand them?
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Let’s change tack for a moment.
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Inferring is an action
Consider the difference:
Tweety is a bird. Tweety flies.
Tweety is a bird. So, Tweety flies.
�ere is a difference between making two assertions,and making one assertion to give a reason for another.
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Inferring is an action
Consider the difference:
Tweety is a bird. Tweety flies.
Tweety is a bird. So, Tweety flies.
�ere is a difference between making two assertions,and making one assertion to give a reason for another.
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Inferring is an action
Consider the difference:
Tweety is a bird. Tweety flies.
Tweety is a bird. So, Tweety flies.
�ere is a difference between making two assertions,and making one assertion to give a reason for another.
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Inferring is an action
Consider the difference:
Tweety is a bird. Tweety flies.
Tweety is a bird. So, Tweety flies.
�ere is a difference between making two assertions,and making one assertion to give a reason for another.
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Inferring is an action
Consider the difference:
Tweety is a bird. Tweety flies.
Tweety is a bird. So, Tweety flies.
�ere is a difference between making two assertions,and making one assertion to give a reason for another.
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Reason giving appears in question answering
Tweety is a bird. So, Tweety flies.
abelard: Does Tweety fly?eloise: Yes, she’s a bird.
This is beef. So, this is food.
abelard: Is this food?eloise: Yes, it’s beef.
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Reason giving appears in question answering
Tweety is a bird. So, Tweety flies.
abelard: Does Tweety fly?eloise: Yes, she’s a bird.
This is beef. So, this is food.
abelard: Is this food?eloise: Yes, it’s beef.
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Reason giving appears in question answering
Tweety is a bird. So, Tweety flies.
abelard: Does Tweety fly?eloise: Yes, she’s a bird.
This is beef. So, this is food.
abelard: Is this food?eloise: Yes, it’s beef.
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Reason giving appears in question answering
Tweety is a bird. So, Tweety flies.
abelard: Does Tweety fly?eloise: Yes, she’s a bird.
This is beef. So, this is food.
abelard: Is this food?eloise: Yes, it’s beef.
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Reason giving appears in question answering
Tweety is a bird. So, Tweety flies.
abelard: Does Tweety fly?eloise: Yes, she’s a bird.
This is beef. So, this is food.
abelard: Is this food?eloise: Yes, it’s beef.
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Reason giving can go in both directions
abelard: Does she have stripes?eloise: Yes, she’s a zebra.
abelard: Is she a zebra?eloise: Yes, she has stripes.
Each direction can make sense,given an appropriate context.
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Reason giving can go in both directions
abelard: Does she have stripes?eloise: Yes, she’s a zebra.
abelard: Is she a zebra?eloise: Yes, she has stripes.
Each direction can make sense,given an appropriate context.
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Reason giving can go in both directions
abelard: Does she have stripes?eloise: Yes, she’s a zebra.
abelard: Is she a zebra?eloise: Yes, she has stripes.
Each direction can make sense,given an appropriate context.
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So can explanation
eloise: She has stripes.abelard: Why?
eloise: She’s a zebra.
eloise: She’s a zebra.abelard: Why?
eloise: She has stripes.
Each direction can make sense,given an appropriate context.
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So can explanation
eloise: She has stripes.abelard: Why?
eloise: She’s a zebra.
eloise: She’s a zebra.abelard: Why?
eloise: She has stripes.
Each direction can make sense,given an appropriate context.
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So can explanation
eloise: She has stripes.abelard: Why?
eloise: She’s a zebra.
eloise: She’s a zebra.abelard: Why?
eloise: She has stripes.
Each direction can make sense,given an appropriate context.
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What is inference?
... or rather, what are we doing when we infer or explain?
I I won’t commit myself to any particular analysis of the normsgoverning inference and explanation. (c.f. Brandom, in Making it
Explicit, and his view of the relationship between inference,commitment and entitlement.)
I �ese are speech acts, like assertion.(I can infer B from A despite believing B before believing A.Inferring, in this sense, isn’t believing on the basis of. �e same goesfor explaining or justifying.)
I Making an inference is also not to be identified with offering adeductively valid argument, or taking yourself to do so.
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What is inference?
... or rather, what are we doing when we infer or explain?
I I won’t commit myself to any particular analysis of the normsgoverning inference and explanation. (c.f. Brandom, in Making it
Explicit, and his view of the relationship between inference,commitment and entitlement.)
I �ese are speech acts, like assertion.(I can infer B from A despite believing B before believing A.Inferring, in this sense, isn’t believing on the basis of. �e same goesfor explaining or justifying.)
I Making an inference is also not to be identified with offering adeductively valid argument, or taking yourself to do so.
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What is inference?
... or rather, what are we doing when we infer or explain?
I I won’t commit myself to any particular analysis of the normsgoverning inference and explanation. (c.f. Brandom, in Making it
Explicit, and his view of the relationship between inference,commitment and entitlement.)
I �ese are speech acts, like assertion.(I can infer B from A despite believing B before believing A.Inferring, in this sense, isn’t believing on the basis of. �e same goesfor explaining or justifying.)
I Making an inference is also not to be identified with offering adeductively valid argument, or taking yourself to do so.
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What is inference?
... or rather, what are we doing when we infer or explain?
I I won’t commit myself to any particular analysis of the normsgoverning inference and explanation. (c.f. Brandom, in Making it
Explicit, and his view of the relationship between inference,commitment and entitlement.)
I �ese are speech acts, like assertion.(I can infer B from A despite believing B before believing A.Inferring, in this sense, isn’t believing on the basis of. �e same goesfor explaining or justifying.)
I Making an inference is also not to be identified with offering adeductively valid argument, or taking yourself to do so.
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What is inference? (Cont.)
Reason giving is defeasible, or non-monotonic:
Tweety is a bird. So, Tweety flies.
Tweety is a bird. Tweety is a penguin. So, Tweety flies.
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What is inference? (Cont.)
Reason giving is defeasible, or non-monotonic:
Tweety is a bird. So, Tweety flies.
Tweety is a bird. Tweety is a penguin. So, Tweety flies.
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Why infer?
Why (do we/should we) care abouthow our claims relate to one another?
Why not just care about whether A and B are true,and ignore whether A is a reason for B?
(Or, why do children ask why instead of just asking whether?)
Why attempt to keep track of how claims relate to oneanother?
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Why infer?
Why (do we/should we) care abouthow our claims relate to one another?
Why not just care about whether A and B are true,and ignore whether A is a reason for B?
(Or, why do children ask why instead of just asking whether?)
Why attempt to keep track of how claims relate to oneanother?
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Why infer?
Why (do we/should we) care abouthow our claims relate to one another?
Why not just care about whether A and B are true,and ignore whether A is a reason for B?
(Or, why do children ask why instead of just asking whether?)
Why attempt to keep track of how claims relate to oneanother?
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Why infer?
Why (do we/should we) care abouthow our claims relate to one another?
Why not just care about whether A and B are true,and ignore whether A is a reason for B?
(Or, why do children ask why instead of just asking whether?)
Why attempt to keep track of how claims relate to oneanother?
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
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Two reasons for having practices of inferring and explaining
planning and contingency
theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra...
Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra
Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
Greg Restall Generics: Inference & Accommodation 27 of 59
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
Greg Restall Generics: Inference & Accommodation 27 of 59
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action
Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
Greg Restall Generics: Inference & Accommodation 27 of 59
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
Greg Restall Generics: Inference & Accommodation 27 of 59
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive
Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
Greg Restall Generics: Inference & Accommodation 27 of 59
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
Greg Restall Generics: Inference & Accommodation 27 of 59
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical”
“Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
Greg Restall Generics: Inference & Accommodation 27 of 59
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
Greg Restall Generics: Inference & Accommodation 27 of 59
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Two reasons for having practices of inferring and explaining
planning and contingency theorising and uncertainty
If we find a zebra... Is this a zebra?
Suppose that had been a zebra Suppose that’s actually a zebra
Options for action Options for belief
Subjunctive Indicative
“Metaphysical” “Epistemic”
It is hard to see how we could act
on the basis of shared views withoutsome kind of reason-giving practice.
Greg Restall Generics: Inference & Accommodation 27 of 59
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Claim 1: Generics make inferential transitions explicit
Tweety is a bird. So, Tweety flies.
— Birds fly.
She’s a zebra. So, she has stripes.— Zebras have stripes.
She has stripes. So, she’s a zebra.— Striped things are zebras.— Striped horses are zebras.
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Claim 1: Generics make inferential transitions explicit
Tweety is a bird. So, Tweety flies.— Birds fly.
She’s a zebra. So, she has stripes.— Zebras have stripes.
She has stripes. So, she’s a zebra.— Striped things are zebras.— Striped horses are zebras.
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Claim 1: Generics make inferential transitions explicit
Tweety is a bird. So, Tweety flies.— Birds fly.
She’s a zebra. So, she has stripes.
— Zebras have stripes.
She has stripes. So, she’s a zebra.— Striped things are zebras.— Striped horses are zebras.
Greg Restall Generics: Inference & Accommodation 28 of 59
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Claim 1: Generics make inferential transitions explicit
Tweety is a bird. So, Tweety flies.— Birds fly.
She’s a zebra. So, she has stripes.— Zebras have stripes.
She has stripes. So, she’s a zebra.— Striped things are zebras.— Striped horses are zebras.
Greg Restall Generics: Inference & Accommodation 28 of 59
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Claim 1: Generics make inferential transitions explicit
Tweety is a bird. So, Tweety flies.— Birds fly.
She’s a zebra. So, she has stripes.— Zebras have stripes.
She has stripes. So, she’s a zebra.
— Striped things are zebras.— Striped horses are zebras.
Greg Restall Generics: Inference & Accommodation 28 of 59
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Claim 1: Generics make inferential transitions explicit
Tweety is a bird. So, Tweety flies.— Birds fly.
She’s a zebra. So, she has stripes.— Zebras have stripes.
She has stripes. So, she’s a zebra.— Striped things are zebras.
— Striped horses are zebras.
Greg Restall Generics: Inference & Accommodation 28 of 59
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Claim 1: Generics make inferential transitions explicit
Tweety is a bird. So, Tweety flies.— Birds fly.
She’s a zebra. So, she has stripes.— Zebras have stripes.
She has stripes. So, she’s a zebra.— Striped things are zebras.— Striped horses are zebras.
Greg Restall Generics: Inference & Accommodation 28 of 59
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Making inference explicit
I can make explicit my preparednessto infer Gx from Fx
by saying
Fs are Gs.
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Making inference explicit
I can make explicit my preparednessto infer Gx from Fx
or to explain Gx by way of Fxby saying
Fs are Gs.
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This explains many of the distinctive features of generics
I Exceptions: Birds fly. (Yes! Despite penguins.)
I Tweety is a bird is a good reason for Tweety flies, even if this does notapply to all birds.
I Failure of weakening of the consequent: Birds lay eggs. (Yes!) Birds arefemale. (No!)
I Does Tweety lay eggs? Yes, Tweety is a bird. (Good!)Is Tweety female? Yes, Tweety is a bird. (????)Or, Tweety lays eggs since Tweety is a bird. (Good!)Tweety is female since Tweety is a bird. (???)
I Low rate generics with striking properties: Mosquitos transmit rrf.I Given that reason giving does admit exceptions, in the case of
striking/dangerous properties, it is much better to err on the side offalse positives than false negatives. At the very least, we are happy toexplain This transmits rrf by granting this is a mosquito.
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This explains many of the distinctive features of generics
I Exceptions: Birds fly. (Yes! Despite penguins.)I Tweety is a bird is a good reason for Tweety flies, even if this does not
apply to all birds.
I Failure of weakening of the consequent: Birds lay eggs. (Yes!) Birds arefemale. (No!)
I Does Tweety lay eggs? Yes, Tweety is a bird. (Good!)Is Tweety female? Yes, Tweety is a bird. (????)Or, Tweety lays eggs since Tweety is a bird. (Good!)Tweety is female since Tweety is a bird. (???)
I Low rate generics with striking properties: Mosquitos transmit rrf.I Given that reason giving does admit exceptions, in the case of
striking/dangerous properties, it is much better to err on the side offalse positives than false negatives. At the very least, we are happy toexplain This transmits rrf by granting this is a mosquito.
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This explains many of the distinctive features of generics
I Exceptions: Birds fly. (Yes! Despite penguins.)I Tweety is a bird is a good reason for Tweety flies, even if this does not
apply to all birds.I Failure of weakening of the consequent: Birds lay eggs. (Yes!) Birds are
female. (No!)
I Does Tweety lay eggs? Yes, Tweety is a bird. (Good!)Is Tweety female? Yes, Tweety is a bird. (????)Or, Tweety lays eggs since Tweety is a bird. (Good!)Tweety is female since Tweety is a bird. (???)
I Low rate generics with striking properties: Mosquitos transmit rrf.I Given that reason giving does admit exceptions, in the case of
striking/dangerous properties, it is much better to err on the side offalse positives than false negatives. At the very least, we are happy toexplain This transmits rrf by granting this is a mosquito.
Greg Restall Generics: Inference & Accommodation 30 of 59
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This explains many of the distinctive features of generics
I Exceptions: Birds fly. (Yes! Despite penguins.)I Tweety is a bird is a good reason for Tweety flies, even if this does not
apply to all birds.I Failure of weakening of the consequent: Birds lay eggs. (Yes!) Birds are
female. (No!)I Does Tweety lay eggs? Yes, Tweety is a bird. (Good!)
Is Tweety female? Yes, Tweety is a bird. (????)Or, Tweety lays eggs since Tweety is a bird. (Good!)Tweety is female since Tweety is a bird. (???)
I Low rate generics with striking properties: Mosquitos transmit rrf.I Given that reason giving does admit exceptions, in the case of
striking/dangerous properties, it is much better to err on the side offalse positives than false negatives. At the very least, we are happy toexplain This transmits rrf by granting this is a mosquito.
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This explains many of the distinctive features of generics
I Exceptions: Birds fly. (Yes! Despite penguins.)I Tweety is a bird is a good reason for Tweety flies, even if this does not
apply to all birds.I Failure of weakening of the consequent: Birds lay eggs. (Yes!) Birds are
female. (No!)I Does Tweety lay eggs? Yes, Tweety is a bird. (Good!)
Is Tweety female? Yes, Tweety is a bird. (????)
Or, Tweety lays eggs since Tweety is a bird. (Good!)Tweety is female since Tweety is a bird. (???)
I Low rate generics with striking properties: Mosquitos transmit rrf.I Given that reason giving does admit exceptions, in the case of
striking/dangerous properties, it is much better to err on the side offalse positives than false negatives. At the very least, we are happy toexplain This transmits rrf by granting this is a mosquito.
Greg Restall Generics: Inference & Accommodation 30 of 59
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This explains many of the distinctive features of generics
I Exceptions: Birds fly. (Yes! Despite penguins.)I Tweety is a bird is a good reason for Tweety flies, even if this does not
apply to all birds.I Failure of weakening of the consequent: Birds lay eggs. (Yes!) Birds are
female. (No!)I Does Tweety lay eggs? Yes, Tweety is a bird. (Good!)
Is Tweety female? Yes, Tweety is a bird. (????)Or, Tweety lays eggs since Tweety is a bird. (Good!)Tweety is female since Tweety is a bird. (???)
I Low rate generics with striking properties: Mosquitos transmit rrf.I Given that reason giving does admit exceptions, in the case of
striking/dangerous properties, it is much better to err on the side offalse positives than false negatives. At the very least, we are happy toexplain This transmits rrf by granting this is a mosquito.
Greg Restall Generics: Inference & Accommodation 30 of 59
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This explains many of the distinctive features of generics
I Exceptions: Birds fly. (Yes! Despite penguins.)I Tweety is a bird is a good reason for Tweety flies, even if this does not
apply to all birds.I Failure of weakening of the consequent: Birds lay eggs. (Yes!) Birds are
female. (No!)I Does Tweety lay eggs? Yes, Tweety is a bird. (Good!)
Is Tweety female? Yes, Tweety is a bird. (????)Or, Tweety lays eggs since Tweety is a bird. (Good!)Tweety is female since Tweety is a bird. (???)
I Low rate generics with striking properties: Mosquitos transmit rrf.
I Given that reason giving does admit exceptions, in the case ofstriking/dangerous properties, it is much better to err on the side offalse positives than false negatives. At the very least, we are happy toexplain This transmits rrf by granting this is a mosquito.
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This explains many of the distinctive features of generics
I Exceptions: Birds fly. (Yes! Despite penguins.)I Tweety is a bird is a good reason for Tweety flies, even if this does not
apply to all birds.I Failure of weakening of the consequent: Birds lay eggs. (Yes!) Birds are
female. (No!)I Does Tweety lay eggs? Yes, Tweety is a bird. (Good!)
Is Tweety female? Yes, Tweety is a bird. (????)Or, Tweety lays eggs since Tweety is a bird. (Good!)Tweety is female since Tweety is a bird. (???)
I Low rate generics with striking properties: Mosquitos transmit rrf.I Given that reason giving does admit exceptions, in the case of
striking/dangerous properties, it is much better to err on the side offalse positives than false negatives.
At the very least, we are happy toexplain This transmits rrf by granting this is a mosquito.
Greg Restall Generics: Inference & Accommodation 30 of 59
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This explains many of the distinctive features of generics
I Exceptions: Birds fly. (Yes! Despite penguins.)I Tweety is a bird is a good reason for Tweety flies, even if this does not
apply to all birds.I Failure of weakening of the consequent: Birds lay eggs. (Yes!) Birds are
female. (No!)I Does Tweety lay eggs? Yes, Tweety is a bird. (Good!)
Is Tweety female? Yes, Tweety is a bird. (????)Or, Tweety lays eggs since Tweety is a bird. (Good!)Tweety is female since Tweety is a bird. (???)
I Low rate generics with striking properties: Mosquitos transmit rrf.I Given that reason giving does admit exceptions, in the case of
striking/dangerous properties, it is much better to err on the side offalse positives than false negatives. At the very least, we are happy toexplain This transmits rrf by granting this is a mosquito.
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Why this form?
We can infer from any A to any B.
Why are generics, of the form Fs are Gs, so prevalent?
In dialogue or in planning,the focus of inquiry is often fixed.
So, inferences of the from suitable for explicationby a generic (from Fx to Gx) are widespread.
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Why this form?
We can infer from any A to any B.
Why are generics, of the form Fs are Gs, so prevalent?
In dialogue or in planning,the focus of inquiry is often fixed.
So, inferences of the from suitable for explicationby a generic (from Fx to Gx) are widespread.
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Why make inference explicit?
To teach ...
... and to refine.
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Why make inference explicit?
To teach ...
... and to refine.
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Why make inference explicit?
To teach ...
... and to refine.
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Training for Inference
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Training for Inference
We communicate andcoordinate on inferences:
if you’ve learned that birds fly,you’ll accept “x is a bird”
as a reason to conclude “x flies,”or to explain “x flies”
by appeal to “x is a bird.”
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Local and Global
�e information conveyed can be local.
Consider a zoo enclosure with a range of horse-likecreatures: I might say “striped ones are zebras”.
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Refining Inference
You can object to my inference
Fa. So, Ga.
in three different (related) ways:
(1) Deny Fa. (2) Deny Ga. (3) Deny the So.
We have words for (1) and (2).
How do you voice objection (3)?
Making inferences explicitgives us a way to argue about them.
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Refining Inference
You can object to my inference
Fa. So, Ga.
in three different (related) ways:
(1) Deny Fa. (2) Deny Ga. (3) Deny the So.
We have words for (1) and (2).
How do you voice objection (3)?
Making inferences explicitgives us a way to argue about them.
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Refining Inference
You can object to my inference
Fa. So, Ga.
in three different (related) ways:
(1) Deny Fa. (2) Deny Ga. (3) Deny the So.
We have words for (1) and (2).
How do you voice objection (3)?
Making inferences explicitgives us a way to argue about them.
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Refining Inference
You can object to my inference
Fa. So, Ga.
in three different (related) ways:
(1) Deny Fa. (2) Deny Ga. (3) Deny the So.
We have words for (1) and (2).
How do you voice objection (3)?
Making inferences explicitgives us a way to argue about them.
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This is subtle
What is it to deny that birds fly?
Birds don’t fly?
Fs are non-Gs not (Fs are Gs)
�e grammar of generics makes denying them difficult.
We often move to more explicit quantification:many birds don’t fly, or not all birds fly.
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This is subtle
What is it to deny that birds fly?
Birds don’t fly?
Fs are non-Gs not (Fs are Gs)
�e grammar of generics makes denying them difficult.
We often move to more explicit quantification:many birds don’t fly, or not all birds fly.
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This is subtle
What is it to deny that birds fly?
Birds don’t fly?
Fs are non-Gs not (Fs are Gs)
�e grammar of generics makes denying them difficult.
We often move to more explicit quantification:many birds don’t fly, or not all birds fly.
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The inferential analysis of generics explains this, too
Resisting the inference from Fx to Gx
does not, by itself, offer an alternative inference.
Neither does it make much of a claim at all, by itself.
We’ll return to this topic later.
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The inferential analysis of generics explains this, too
Resisting the inference from Fx to Gx
does not, by itself, offer an alternative inference.
Neither does it make much of a claim at all, by itself.
We’ll return to this topic later.
Greg Restall Generics: Inference & Accommodation 39 of 59
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The inferential analysis of generics explains this, too
Resisting the inference from Fx to Gx
does not, by itself, offer an alternative inference.
Neither does it make much of a claim at all, by itself.
We’ll return to this topic later.
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accommodation& inference
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Common Ground
�e common ground of a conversation at any given time
is the set of propositions that the participants in that conver-
sation at that time mutually assume to be taken for granted
and not subject to (further) discussion.
— Kai von Fintel“What is Presupposition Accommodation, Again?”
Philosophical Perspectives, 2008.
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One way to enter the common ground
When uttered assertively, sentences are meant to update the
common ground. If a sentence is accepted by the partici-
pants, the proposition it expresses is added to the common
ground.
— Kai von Fintel“What is Presupposition Accommodation, Again?”
Philosophical Perspectives, 2008.
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Another way to enter the common ground
If there are drinks after the seminar, my son will come.
When I say this, the proposition that I have a son(and perhaps that I have only one son)
is added to the common ground.
�is phenomenon is called presupposition accommodation.
(�e details of how—and which—presuppositions areaccommodated is a matter of debate and active research.)
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Another way to enter the common ground
If there are drinks after the seminar, my son will come.
When I say this, the proposition that I have a son(and perhaps that I have only one son)
is added to the common ground.
�is phenomenon is called presupposition accommodation.
(�e details of how—and which—presuppositions areaccommodated is a matter of debate and active research.)
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Another way to enter the common ground
If there are drinks after the seminar, my son will come.
When I say this, the proposition that I have a son(and perhaps that I have only one son)
is added to the common ground.
�is phenomenon is called presupposition accommodation.
(�e details of how—and which—presuppositions areaccommodated is a matter of debate and active research.)
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Accommodating Injustice
Rae Langton explores the ethical contoursof accommodation phenomena
in Accommodating Injustice.
Sometimes we find ourselves committed to substantial claimswe never explicitly considered. We have accommodated them.
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Accommodating Injustice
Rae Langton explores the ethical contoursof accommodation phenomena
in Accommodating Injustice.
Sometimes we find ourselves committed to substantial claimswe never explicitly considered. We have accommodated them.
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Claim 2: Inference and the Common Ground
If you make the inferenceFa, therefore Ga,
and you meet with no objection,then not only are Fa and Ga
added to the common ground,but so is the generic: Fs are Gs.
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Claim 2: Inference and the Common Ground
If you make the inferenceFa, therefore Ga,
and you meet with no objection,
then not only are Fa and Ga
added to the common ground,but so is the generic: Fs are Gs.
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Claim 2: Inference and the Common Ground
If you make the inferenceFa, therefore Ga,
and you meet with no objection,then not only are Fa and Ga
added to the common ground,
but so is the generic: Fs are Gs.
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Claim 2: Inference and the Common Ground
If you make the inferenceFa, therefore Ga,
and you meet with no objection,then not only are Fa and Ga
added to the common ground,but so is the generic: Fs are Gs.
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Of course .. .
�is could be highly local.
Recall: she has stripes, so she’s a zebra.
Striped things (here) are zebras.
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Of course .. .
�is could be highly local.
Recall: she has stripes, so she’s a zebra.
Striped things (here) are zebras.
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This isn’t presupposition accommodation
�e speech act of inference is explicit.It can be rejected, just as an assertion can.
I can reject the inference Fa, so Ga,while accepting Fa and Ga.
Whether the inference isaccepted or rejected should make
some difference in the common ground.
If the inference is made explicit bya generic this can do the job.
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This isn’t presupposition accommodation
�e speech act of inference is explicit.It can be rejected, just as an assertion can.
I can reject the inference Fa, so Ga,while accepting Fa and Ga.
Whether the inference isaccepted or rejected should make
some difference in the common ground.
If the inference is made explicit bya generic this can do the job.
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This isn’t presupposition accommodation
�e speech act of inference is explicit.It can be rejected, just as an assertion can.
I can reject the inference Fa, so Ga,while accepting Fa and Ga.
Whether the inference isaccepted or rejected should make
some difference in the common ground.
If the inference is made explicit bya generic this can do the job.
Greg Restall Generics: Inference & Accommodation 47 of 59
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This isn’t presupposition accommodation
�e speech act of inference is explicit.It can be rejected, just as an assertion can.
I can reject the inference Fa, so Ga,while accepting Fa and Ga.
Whether the inference isaccepted or rejected should make
some difference in the common ground.
If the inference is made explicit bya generic this can do the job.
Greg Restall Generics: Inference & Accommodation 47 of 59
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Consequences
I �is commitment (Fs are Gs) goes beyond the explicitsubject matter (the object a) under discussion.
I Since generics are generic, they can persist, even afterthe details fade from attention.
I We can find ourselves accepting generics (and perhaps,believing them) without ever having explicitly consideredthem.
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Consequences
I �is commitment (Fs are Gs) goes beyond the explicitsubject matter (the object a) under discussion.
I Since generics are generic, they can persist, even afterthe details fade from attention.
I We can find ourselves accepting generics (and perhaps,believing them) without ever having explicitly consideredthem.
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Consequences
I �is commitment (Fs are Gs) goes beyond the explicitsubject matter (the object a) under discussion.
I Since generics are generic, they can persist, even afterthe details fade from attention.
I We can find ourselves accepting generics (and perhaps,believing them) without ever having explicitly consideredthem.
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options forcritique& reform
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Striking properties and generics
Mosquitos transmit rrf.
Logic talks are boring.
Muslims are terrorists.
�ese are hard to uproot,or to argue against.
Not all mosquitos. Not all logic talks. Not all Muslims.
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Striking properties and generics
Mosquitos transmit rrf.
Logic talks are boring.
Muslims are terrorists.
�ese are hard to uproot,or to argue against.
Not all mosquitos. Not all logic talks. Not all Muslims.
Greg Restall Generics: Inference & Accommodation 50 of 59
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Striking properties and generics
Mosquitos transmit rrf.
Logic talks are boring.
Muslims are terrorists.
�ese are hard to uproot,or to argue against.
Not all mosquitos. Not all logic talks. Not all Muslims.
Greg Restall Generics: Inference & Accommodation 50 of 59
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Striking properties and generics
Mosquitos transmit rrf.
Logic talks are boring.
Muslims are terrorists.
�ese are hard to uproot,or to argue against.
Not all mosquitos. Not all logic talks. Not all Muslims.
Greg Restall Generics: Inference & Accommodation 50 of 59
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How to deny a generic
I To reject or deny Fs are Gs, you need to undercut theinference from Fa to Ga and the practice of explainingGa in terms of Fa.
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How to deny a generic
I In a controlled environment, we can undercut thegeneric by being more specific, by moving to explicitlystated quantifiers.
I Are all Fs Gs? Are most? How many?
I �is can work, but it is hard to resist forming genericjudgements. Syntactic discipline takes work.
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How to deny a generic
I In a controlled environment, we can undercut thegeneric by being more specific, by moving to explicitlystated quantifiers.
I Are all Fs Gs? Are most? How many?
I �is can work, but it is hard to resist forming genericjudgements. Syntactic discipline takes work.
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How to deny a generic
I In a controlled environment, we can undercut thegeneric by being more specific, by moving to explicitlystated quantifiers.
I Are all Fs Gs? Are most? How many?
I �is can work, but it is hard to resist forming genericjudgements. Syntactic discipline takes work.
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How to deny a generic
I When G is a striking property, it’s not enough to say thatmany or most Fs are not Gs.
(After all, most mosquitos don’t carry rrf.)
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How to deny a generic
I When G is a striking property, it’s not enough to say thatmany or most Fs are not Gs.
(After all, most mosquitos don’t carry rrf.)
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How to deny a generic
I One way to undercut the inference from Fa to Ga is toinstitute a practice in which the question of whethersomething is G or not doesn’t arise.
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How to deny a generic
I When we care about the property G, we won’t want torevise the concept away. So another approach is to findan alternate explanation for Ga, other than Fa.
I If not all species or genus of mosquito carry rrf, then we couldrefine our generic to the more specific one, that Mosquitos ofgenus Culex carry rrf, while agreeing that mosquitos outsidethat genus don’t carry rrf.
I Explanations of this shape might undercut the generic Muslimsare terrorists, by replacing them with better explanations —such as research showing that domestic violence is a muchstronger predictor of involvement in terrorism.
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How to deny a generic
I When we care about the property G, we won’t want torevise the concept away. So another approach is to findan alternate explanation for Ga, other than Fa.
I If not all species or genus of mosquito carry rrf, then we couldrefine our generic to the more specific one, that Mosquitos ofgenus Culex carry rrf, while agreeing that mosquitos outsidethat genus don’t carry rrf.
I Explanations of this shape might undercut the generic Muslimsare terrorists, by replacing them with better explanations —such as research showing that domestic violence is a muchstronger predictor of involvement in terrorism.
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How to deny a generic
I When we care about the property G, we won’t want torevise the concept away. So another approach is to findan alternate explanation for Ga, other than Fa.
I If not all species or genus of mosquito carry rrf, then we couldrefine our generic to the more specific one, that Mosquitos ofgenus Culex carry rrf, while agreeing that mosquitos outsidethat genus don’t carry rrf.
I Explanations of this shape might undercut the generic Muslimsare terrorists, by replacing them with better explanations —such as research showing that domestic violence is a muchstronger predictor of involvement in terrorism.
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How to deny a generic
I In any case, denying a generic requires changing notonly our explicit theory, but our dispositions to infer.
I �ese dispositions is expressed not just in the claims wemake. �ey are revealed in how we string those claimstogether.
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The Upshot
�e strange behaviour of generic judgementscan be explained by their grounding
in our inferential practice.
�is helps us understand the difficultiesand some of the possibilities for
reforming and revising those practicesand the views they represent.
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thank you!
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Thank you!
slides: http://consequently.org/presentation/
feedback: @consequently on Twitter,or email at [email protected]
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