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The Dream of an Intelligent Machine Hans W. Guesgen Computer Science Department The Beginning of AI AI itself is a young field, but … It has inherited from other disciplines: – Philosophy – Mathematics – Psychology – Computer engineering – Linguistics Gestation of AI McCulloch and Pitts (1943): – Model of artificial neurons – Any computable function can be computed by some network of neurons – Suitably defined neural networks can learn Newell and Simon (Dartmouth, 1956) – Logic Theorist (LT) Great Expectations Early successes: – Lisp – Microworlds Simon (1957): – It is not my aim to surprise or shock you – but the simplest way I can summarize is to say that there are now in the world machines that think, that learn and that create. Moreover, their ability to do these things is going to increase rapidly until – in a visible future – the range of problems they can handle will be coextensive with the range to which human mind has been applied. A Dose of Reality Many AI problems are intractable: – Combinatorial explosion – NP-complete Solving problems often requires subject knowledge: – Translation from German into English – Finding a good route into the city during rush hour Knowledge-Based Systems Closed-world assumption Expertise in a limited field Rule-based approach Examples: – – – – MYCIN DENDRAL PROSPECTOR R1 Games Checkers (or draught): – Samuel’s checker program (1952) – Schaeffer’s program CHINOOK (won 1992 U.S. Open) Chess – Kasparov vs. Deep Blue (1997) Intelligent Agents New paradigm for AI systems: – Uses sensors to perceive the environment – Uses effectors to act upon that environment – Uses planning to behave rational Multi-Agent Systems Agents collaborating with each other Distributed competence/intelligence Emergent rather than individual intelligence Related Issues AI and humanoid form AI and emotions AI and gender AI and …