Cnf formula - Study guides, Class notes & Summaries

What is a skolem constant? Ans: Used to remove existential quantifier from FOL to transform to propositional logic. C1. What is a definite clause? Give an example Ans: A clause with exactly one positive literal. Example: - NOT A or NOTB or C - C What is a Horn Clause? Is it CNF or DNF? Ans: Clause with at most 1 positive literal. Example: - NOT A or NOT B or C - NOT A or NOT B or NOT C CNF Which tree search strategy do we use for Backward Chaining to solve first order logic? Ans: ...

Proof by Exhaustion Prove the statement by checking each element individually. Unlike proof by cases, exhaustive proof looks at every case in a way that is not general. Proof by Counterexample Used to disprove a universal statement. For example, to disprove the statement, "All prime numbers are odd" find one example where this statement is false—the number 2—which is both even and prime. Direct Proof In the direct proof, we assume the hypothesis p is true and we try to pro...

CS161 Introduction To AI Exam With Questions And Correct Answers ...

WGU C959 Flashcards (Master set) Already Graded A Proof by Exhaustion Prove the statement by checking each element individually. Unlike proof by cases, exhaustive proof looks at every case in a way that is not general. Proof by Counterexample Used to disprove a universal statement. For example, to disprove the statement, "All prime numbers are odd" find one example where this statement is false—the number 2—which is both even and prime. Direct Proof In the direct proof, we assume the hy...