ITU Presents: Artificial Intelligence€¦ · ARTIFICIAL EMOTIONAL INTELLIGENCE (AEI) •In the...
Transcript of ITU Presents: Artificial Intelligence€¦ · ARTIFICIAL EMOTIONAL INTELLIGENCE (AEI) •In the...
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ARTIFICIAL INTELLIGENCE
ITU PRESENTS
FEB. 15, 2018
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WHAT IS ARTIFICIAL INTELLIGENCE ?
• Making computers that think?
• The automation of activities we associate with human
thinking, like decision making, learning ... ?
• The art of creating machines that perform functions that
require intelligence when performed by people ?
• The study of mental faculties through the use of
computational models ?
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WHAT IS ARTIFICIAL INTELLIGENCE ?
• The study of computations that make it possible to perceive,
reason and act ?
• A field of study that seeks to explain and emulate intelligent
behaviour in terms of computational processes ?
• A branch of computer science that is concerned with the
automation of intelligent behaviour ?
• Anything in Computing Science that we don't yet know how
to do properly ? (!)
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AREAS OF AI AND OTHER FIELDS
Search
Vision
Planning Machine
Learning
Knowledge
Representation Logic
Expert
Systems Robotics NLP
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RELATIONSHIP OF AI TO MACHINE LEARNING
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WHAT IS ARTIFICIAL INTELLIGENCE ?
Systems that act
rationally
Systems that
think
like humans
Systems that
think
rationally
Systems that act
like humans
THOUGHT
BEHAVIOUR
HUMAN RATIONAL
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• Artificial
Produced by human art or effort, rather than originating naturally.
• Intelligence
is the ability to acquire knowledge and use it" [Pigford and Baur]
• So AI was defined as:
• is the study of ideas that enable computers to be intelligent.
• is the part of computer science concerned with design of computer systems that exhibit human intelligence (From the Concise Oxford Dictionary)
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From the above two definitions, we can see that AI has two major roles:
• Study the intelligent part concerned with humans.
• Represent those actions using computers.
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GOALS OF AI
• To make computers more useful by letting them take over dangerous or tedious tasks from human
• Understand principles of human intelligence
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THE FOUNDATION OF AI
• Philosophy
• At that time, the study of human intelligence began with no formal expression
• Initiate the idea of mind as a machine and its internal operations
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THE FOUNDATION OF AI
Mathematics formalizes the three main area of AI: computation, logic, and probability Computation leads to analysis of the problems
that can be computed complexity theory
Probability contributes the “degree of belief” to handle uncertainty in AI
Decision theory combines probability theory and utility theory (bias)
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THE FOUNDATION OF AI
• Psychology
• How do humans think and act?
• The study of human reasoning and acting
• Provides reasoning models for AI
• Strengthen the ideas
• humans and other animals can be considered as information processing machines
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THE FOUNDATION OF AI
• Computer Engineering
• How to build an efficient computer?
• Provides the artifact that makes AI application possible
• The power of computer makes computation of large and difficult problems more easily
• AI has also contributed its own work to computer science, including: time-sharing, the linked list data type, OOP, etc.
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THE FOUNDATION OF AI
• Control theory and Cybernetics
• How can artifacts operate under their own control?
• The artifacts adjust their actions
• To do better for the environment over time
• Based on an objective function and feedback from the environment
• Not limited only to linear systems but also other problems
• as language, vision, and planning, etc.
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THE FOUNDATION OF AI
• Linguistics
• For understanding natural languages
• different approaches has been adopted from the linguistic work
• Formal languages
• Syntactic and semantic analysis
• Knowledge representation
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THE MAIN TOPICS IN AI
Artificial intelligence can be considered under a number of headings:
• Search (includes Game Playing).
• Representing Knowledge and Reasoning with it.
• Planning.
• Learning.
• Natural language processing.
• Expert Systems.
• Interacting with the Environment (e.g. Vision, Speech recognition, Robotics)
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• more powerful and more useful computers
• new and improved interfaces
• solving new problems
• better handling of information
• relieves information overload
• conversion of information into knowledge
Some Advantages of Artificial
Intelligence
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THE DISADVANTAGES
• increased costs
• difficulty with software development - slow and expensive
• few experienced programmers
• few practical products have reached the market as yet.
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WHAT IS ARTIFICIAL INTELLIGENCE ?
Systems that act
rationally
Systems that
think
like humans
Systems that
think
rationally
Systems that act
like humans
THOUGHT
BEHAVIOUR
HUMAN RATIONAL
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SYSTEMS THAT ACT LIKE HUMANS: TURING TEST
• “The art of creating machines that perform functions
that require intelligence when performed by people.”
(Kurzweil)
• “The study of how to make computers do things at
which, at the moment, people are better.” (Rich and
Knight)
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SYSTEMS THAT ACT LIKE HUMANS
• You enter a room which has a computer terminal. You have a fixed period of time to type what you want into the terminal, and study the replies. At the other end of the line is either a human being or a computer system.
• If it is a computer system, and at the end of the period you cannot reliably determine whether it is a system or a human, then the system is deemed to be intelligent.
?
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SYSTEMS THAT ACT LIKE HUMANS
• The Turing Test approach
• a human questioner cannot tell if
• there is a computer or a human answering his question, via teletype (remote communication)
• The computer must behave intelligently
• Intelligent behavior • to achieve human-level performance in all cognitive tasks
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SYSTEMS THAT ACT LIKE HUMANS
• These cognitive tasks include:
• Natural language processing
• for communication with human
• Knowledge representation
• to store information effectively & efficiently
• Automated reasoning
• to retrieve & answer questions using the stored information
• Machine learning
• to adapt to new circumstances
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THE TOTAL TURING TEST
• Includes two more issues:
• Computer vision
• to perceive objects (seeing)
• Robotics
• to move objects (acting)
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DID THIS REALLY PASS TURING TEST?
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FROM TURING TEST TO TOKYO TEST
A group of AI researchers at Japan’s National Institute of Informatics just set a new goal:
Create an AI program capable of passing the nation’s most difficult college entrance exams – including the entrance exam at the University of Tokyo. If an AI program can trick college admissions officers into thinking that it’s a human – it would mark one of the greatest accomplishments yet for AI.
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AI APPLICATIONS
• Computer Security
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AI APPLICATIONS
• Computer Security
Here are some features to use in analyzation of a software by AI to determine its security risk:
o Accessed APIs,
o Accessed fields on the disk,
o Accessed environmental products (camera, keyboard etc),
o Consumed processor power.
o Consumed bandwidth.
o Amount of data transmitted over the internet.
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AI APPLICATIONS
• Computer Security
Type of security apps that can use AI:
o Spam Filter Applications (spamassassin)
o Network Intrusion Detection and Prevention
o Fraud detection
o Credit scoring and next-best offers
o Botnet Detection
o Secure User Authentication
o Cyber security Ratings
o Hacking Incident Forecasting
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AI APPLICATIONS
• Computer Security
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AI APPLICATIONS • Computer Security
There has been a serious increase in the number of startups that focus on cyber security domain. According to CBInsight, in the applications of AI in cyber security is on the 5th place.
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AI-LED QUALITY ASSURANCE
• Test tools will change to use AI.
• Probabilistic methods will be more prominent.
• AI will help generating test cases.
• Test engineers will need AI skills to test software.
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AI APPLICATIONS
• Intelligent Assistant:
• Amazon Alexa, Google Home, Apple HomePod
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AI APPLICATIONS
• Chat Bots:
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AI APPLICATIONS
• Autonomous Planning & Scheduling:
• Autonomous rovers.
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AI APPLICATIONS
• Autonomous Planning & Scheduling:
• Telescope scheduling
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AI APPLICATIONS
• Space Exploration:
• Analysis of big data
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AI APPLICATIONS
• Medicine:
• Image guided surgery
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AI APPLICATIONS
• Medicine:
• Image analysis and enhancement
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AI APPLICATIONS
• Medicine:
• Cancer treatment
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AI APPLICATIONS
• Transportation:
• Autonomous vehicle control
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AI APPLICATIONS • Transportation:
• Pedestrian detection:
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AI APPLICATIONS • Law Enforcement:
• Image recognition:
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AI APPLICATIONS
Virtual Reality and Simulation:
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AI APPLICATIONS • Games:
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AI APPLICATIONS
• Games
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AI APPLICATIONS
• Robotics:
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AI APPLICATIONS
• Robotics:
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AI APPLICATIONS
• Military:
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AI APPLICATIONS
Other application areas:
• Bioinformatics:
• Gene expression data analysis
• Prediction of protein structure
• Text classification, document sorting:
• Web pages, e-mails
• Articles in the news
• Video, image classification
• Music composition, picture drawing
• Natural Language Processing
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AI CONTROVERSY
• Elon Musk facing growing chorus of critics on 'evil' artificial intelligence
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AI CONTROVERSY
• Stephen Hawking says A.I. could be “worst event in the history of our civilization”
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AI CONTROVERSY
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ARTIFICIAL EMOTIONAL INTELLIGENCE (AEI)
• “In the next five years, artificial emotional intelligence is projected to grow into a multibillion-dollar industry, completely transforming industries, market research, innovation, R&D, and just so much more. “
• In a bid to harness the human-like aspect of AI, Amazon, Microsoft, and Google are already in the process of hiring comedians and scriptwriters to build personality into their technologies.
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ARTIFICIAL EMOTIONAL INTELLIGENCE
• “Imagine a robotic stuffed animal that can read and respond to a child's emotional state, a commercial that can recognize and change based on a customer's facial expression, or a company that can actually create feelings as though a person were experiencing them naturally. Heart of the Machine explores the next giant step in the relationship between humans and technology: the ability of computers to recognize, respond to, and even replicate emotions.”
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ARTIFICIAL EMOTIONAL INTELLIGENCE (AEI)
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WHAT IS ARTIFICIAL INTELLIGENCE ?
Systems that act
rationally
Systems that
think
like humans
Systems that think
rationally
Systems that act
like humans
THOUGHT
BEHAVIOUR
HUMAN RATIONAL
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SYSTEMS THAT THINK LIKE HUMANS: COGNITIVE MODELING
• Humans as observed from ‘inside’
• How do we know how humans think?
• Introspection vs. psychological experiments
• Cognitive Science
• “The exciting new effort to make computers think … machines with minds in the full and literal sense” (Haugeland)
• “[The automation of] activities that we associate with human thinking, activities such as decision-making, problem solving, learning …” (Bellman)
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WHAT IS ARTIFICIAL INTELLIGENCE ?
Systems that act
rationally
Systems that think
like humans
Systems that
think
rationally
Systems that act
like humans
THOUGHT
BEHAVIOUR
HUMAN RATIONAL
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SYSTEMS THAT THINK ‘RATIONALLY’ "LAWS OF THOUGHT"
• Humans are not always ‘rational’
• Rational - defined in terms of logic?
• Logic can’t express everything (e.g. uncertainty)
• Logical approach is often not feasible in terms of computation time (needs ‘guidance’)
• “The study of mental facilities through the use of computational models” (Charniak and McDermott)
• “The study of the computations that make it possible to perceive, reason, and act” (Winston)
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WHAT IS ARTIFICIAL INTELLIGENCE ?
Systems that act
rationally
Systems that
think
like humans
Systems that
think
rationally
Systems that act
like humans
THOUGHT
BEHAVIOUR
HUMAN RATIONAL
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SYSTEMS THAT ACT RATIONALLY: “RATIONAL AGENT”
• Rational behavior: doing the right thing
• The right thing: that which is expected to maximize goal achievement, given the available information
• Giving answers to questions is ‘acting’.
• I don't care whether a system:
• replicates human thought processes
• makes the same decisions as humans
• uses purely logical reasoning
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SYSTEMS THAT ACT RATIONALLY
• Logic only part of a rational agent, not all of rationality
• Sometimes logic cannot reason a correct conclusion
• At that time, some specific (in domain) human knowledge or information is used
• Thus, it covers more generally different situations of problems
• Compensate the incorrectly reasoned conclusion
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SYSTEMS THAT ACT RATIONALLY
• Study AI as rational agent –
Two advantages:
• It is more general than using logic only
• Because: LOGIC + Domain knowledge
• It allows extension of the approach with more scientific methodologies
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RATIONAL AGENTS
An agent is an entity that perceives and acts
Abstractly, an agent is a function from percept histories to actions:
[f: P* A]
For any given class of environments and tasks, we seek the agent (or class of agents) with the best performance
Caveat: computational limitations make perfect rationality unachievable
design best program for given machine resources
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SEARCH
• Search is the fundamental technique of AI.
• Possible answers, decisions or courses of action are structured into an abstract space, which we then search.
• Search is either "blind" or “uninformed":
• blind
• we move through the space without worrying about what is coming next, but recognising the answer if we see it
• informed
• we guess what is ahead, and use that information to decide where to look next.
• We may want to search for the first answer that satisfies our goal, or we may want to keep searching until we find the best answer.
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KNOWLEDGE REPRESENTATION & REASONING
• The second most important concept in AI
• If we are going to act rationally in our environment, then we must have
some way of describing that environment and drawing inferences from
that representation.
• how do we describe what we know about the world ?
• how do we describe it concisely ?
• how do we describe it so that we can get hold of the right piece of
knowledge when we need it ?
• how do we generate new pieces of knowledge ?
• how do we deal with uncertain knowledge ?
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Knowledge
Declarative Procedural
• Declarative knowledge deals with factoid
questions (what is the capital of India? Etc.)
• Procedural knowledge deals with “How”
• Procedural knowledge can be embedded in
declarative knowledge
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PLANNING
Given a set of goals, construct a sequence of actions that achieves those goals:
• often very large search space
• but most parts of the world are independent of most other parts
• often start with goals and connect them to actions
• no necessary connection between order of planning and order of execution
• what happens if the world changes as we execute the plan and/or our actions don’t produce the expected results?
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LEARNING
• If a system is going to act truly appropriately, then it must be able to change its actions in the light of experience:
• how do we generate new facts from old ?
• how do we generate new concepts ?
• how do we learn to distinguish different situations in new environments ?
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INTERACTING WITH THE ENVIRONMENT
• In order to enable intelligent behaviour, we will have to interact with our environment.
• Properly intelligent systems may be expected to:
• accept sensory input
• vision, sound, …
• interact with humans
• understand language, recognise speech, generate text, speech and graphics, …
• modify the environment
• robotics
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HISTORY OF AI
• AI has a long history
• Ancient Greece
• Aristotle
• Historical Figures Contributed
• Ramon Lull
• Al Khowarazmi
• Leonardo da Vinci
• David Hume
• George Boole
• Charles Babbage
• John von Neuman
• As old as electronic computers themselves (circa 1940)
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THE ‘VON NEUMAN’ ARCHITECTURE
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HISTORY OF AI
• Origins
• The Dartmouth conference: 1956
• John McCarthy (Stanford)
• Marvin Minsky (MIT)
• Herbert Simon (CMU)
• Allen Newell (CMU)
• Arthur Samuel (IBM)
• The Turing Test (1950)
• “Machines who Think”
• By Pamela McCorckindale
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PERIODS IN AI
• Early period - 1950’s & 60’s
• Game playing
• brute force (calculate your way out)
• Theorem proving
• symbol manipulation
• Biological models
• neural nets
• Symbolic application period - 70’s
• Early expert systems, use of knowledge
• Commercial period - 80’s
• boom in knowledge/ rule bases
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PERIODS IN AI
• 1950’s period - 90’s and into 21st century
• Real-world applications, modelling, better evidence, use of theory, ......
• Topics: data mining, formal models, GA’s, fuzzy logic, agents, neural nets, autonomous systems
• Applications
• visual recognition of traffic
• medical diagnosis
• directory enquiries
• power plant control
• automatic cars
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FASHIONS IN AI
Progress goes in stages, following funding booms and crises: Some examples:
1. Machine translation of languages
1950’s to 1966 - Syntactic translators
1966 - all US funding cancelled
1980 - commercial translators available
2. Neural Networks
1943 - first AI work by McCulloch & Pitts
1950’s & 60’s - Minsky’s book on “Perceptrons” stops nearly all work on nets
1986 - rediscovery of solutions leads to massive growth in neural nets research
The UK had its own funding freeze in 1973 when the Lighthill report reduced AI work severely -Lesson: Don’t claim too much for your discipline!!!!
Look for similar stop/go effects in fields like genetic algorithms and evolutionary computing. This is a very active modern area dating back to the work of Friedberg in 1958.
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SYMBOLIC AND SUB-SYMBOLIC AI
• Symbolic AI is concerned with describing and manipulating our knowledge of the world as explicit symbols, where these symbols have clear relationships to entities in the real world.
• Sub-symbolic AI (e.g. neural-nets) is more concerned with obtaining the correct response to an input stimulus without ‘looking inside the box’ to see if parts of the mechanism can be associated with discrete real world objects.
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REFERENCES
• Stephen Hawking says A.I. could be 'worst event in the history of our civilization'
https://www.cnbc.com/2017/11/06/stephen-hawking-ai-could-be-worst-event-in-civilization.html
• This four-legged robot can open doors and we’re all doomed
https://www.marketwatch.com/story/this-four-legged-robot-can-open-doors-and-were-all-doomed-2018-02-12?siteid=rss&rss=1
• Heart of the Machine
https://books.google.com/books/about/Heart_of_the_Machine.html?id=7Zn3vQAACAAJ&hl=en
• 80+ companies securing the future of AI
https://www.normshield.com/wp-content/uploads/2017/08/Screen-Shot-2017-08-18-at-15.46.13.png
• 5 ways AI will change software testing
https://techbeacon.com/5-ways-ai-will-change-software-testing
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REFERENCES
• How Artificial Intelligence is Changing the Dynamics of Software Testing
http://www.tothenew.com/blog/artificial-intelligence-in-software-testing/
• Artificial Intelligence: From Turing Test to Tokyo Test
http://bigthink.com/endless-innovation/artificial-intelligence-from-turing-test-to-tokyo-test