Logical Inference 4 wrap up

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Logical Inference 4 wrap up Chapter 9 Some material adopted from notes by Andreas Geyer-Schulz,, Chuck Dyer, and Mary Getoor

Summary Logical agents apply inference to KB to derive new information and make decisions Basic concepts of logic: Syntax: formal structure of sentences Semantics: truth of sentences wrt models Entailment: necessary truth of one sentence given another Inference: deriving sentences from other sentences Soundness: derivations produce only entailed sentences Completeness: derivations produce all entailed sentences FC and BC linear time, complete for Horn clauses Resolution is sound and complete for propositional and first-order logic