Lecture Notes for CS 662 - Artificial Intelligence Prog at University of San Francisco (USF)

Notes Information

Material Type:Class Note
Class:CS 662 - Artificial Intelligence Prog
Subject:Computer Science
University:University of San Francisco (CA)
  • Either...or
  • San Francisco
  • Conjunctive
  • Propositional
  • Expressivity
  • Contradiction
  • Conjunction
  • Propositional Logic
  • Implications
  • Satisfaction
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Artificial Intelligence Programming First-Order Logic Chris Brooks Department of Computer Science University of San Francisco Representation Propositional Logic has several nice features Lets us easily express disjunction and negation "There is a pit in (1,1) or in (2,2)" "There is not a pit in (1,1)" This is hard to do in C/Java/Python - variables can only take on a single value. There's no obvious way to assign x the value "3 or 4" or "some value less than 10". Separates declarative knowledge from inference procedures Compositional The meaning of a sentence is a function of the meaning of its parts. Department of Computer Science - University of San Francisco - p.1/? Review of Propositional Logic Sentences are composed of atomic terms conjoined by operators P1,1 ?B1,2 B2,2 ?P1,2 Terms are either true or false. A model is an assignment of values to terms. The set of possible worlds that make a sentence true A model satisfies a sentence if the sentence is true given the assignm...

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