Question: Please help with these two questions 3. Prove or disprove that is a tautology by using the tautology test. 4. Prove that the agument is

Please help with these two questions Please help with these two questions 3. Prove or disprove that

3. Prove or disprove that is a tautology by using the tautology test. 4. Prove that the agument is valid using derivation rules

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