Existential instantiation - PowerPoint PPT Presentation

Inference in first-order logic

Inference in first-order logic. Chapter 9. Outline. Reducing first-order inference to propositional inference Unification Generalized Modus Ponens Forward chaining Backward chaining Resolution. Universal instantiation (UI).

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506 views • 35 slides

Inference in First Order Logic

Inference in First Order Logic. Outline. Reducing first order inference to propositional inference Unification Generalized Modus Ponens Forward and backward chaining Logic programming Resolution. A brief history of reasoning. 450 B.C. Stoics: propositional logic, inference (maybe).

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527 views • 21 slides

ALCN

ALCN. Tableaux Calculus Rules. Intersection. (C D)(x) C(x) D(x). Unless already present. Union. (C D)(x). C(x) D(x). Unless already present. Existential Instantiation. ( R.C )(x) C(y) R(x,y). The y must be a new variable. Unless a z already exists

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247 views • 12 slides

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