Let A Pqr B Pqs C Prs D Pqs And E Pqs Where P Q R And S Represent Meaningful Sta

/in /by

Let A = p∨q∨¬r, B = p∨¬q∨¬s, C = p∨¬r∨¬s, D = ¬p∨¬q∨¬s, and E = p∨q∨¬s, where p, q, r, and s represent meaningful statements. Determine whether A∧ B∧C ∧ D∧E is a tautology. Explain your answer

I have tried to use the and truth table. I got stuck cause there are 4 meaningful statements. Many thanks!

 
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