comp2411 lecture 10 propositional logic programming note this material is not covered in the book resolution applied to horn clauses consider two horn clauses p p1 pn and q q1 ...
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...Comp lecture propositional logic programming note this material is not covered in the book resolution applied to horn clauses consider two p pn and q qm suppose these resolve with say then result which a clause thus produces only s notation denite ahorn said be if it contains positive literal l r example c ef i e d n aset of called program when g gn conclusion such that we would like derive added goal linear aresolution proof starting from set premises can written form sequence m derived by some pair for every premise see gure an based on medical database last theorem completeness programs let there exists descended moreover construct so at each step generated will have next rule producing suces always choose left most atom current descendent against proofs are sld leftmost selection leaves one choice made several rules use all possibilities get tree branch corresponds attempted complete obtained using slection systems prolog search depth rst fashion right input ordered considerd deduc...