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Consider the following set of clauses: {[P(X), P(Y )], [P(U), P(V )]}. 1. Prove that the above set of clauses is unsatisfiable. 2. Prove that

Consider the following set of clauses:

{[P(X), P(Y )], [P(U), P(V )]}.

1. Prove that the above set of clauses is unsatisfiable.

2. Prove that the unsatisfiability cannot be obtained by resolution.

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