Question: Is the following argument valid? Use resolution or resolution refutation to answer. Bill goes to the library on Saturday or on Sunday, Steve also goes

Is the following argument valid? Use resolution or resolution refutation to answer.

Bill goes to the library on Saturday or on Sunday, Steve also goes to the library on Saturday or on Sunday. Therefore, both Bill and Steve will be at the library on Saturday, or both of them will be at the library on Sunday.

For this problem:

Extract the propositions from the argument and name them with single letter.

Translate each sentence in the argument to either a hypothesis or a conclusion in propositional calculus

Convert these expressions into CNF

List the steps of the resolution (refutation) and state whether the argument is valid or not.

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