What Are Tautologies?

1.	What Are Tautologies?
Answer» A TAUTOLOGY is a formula which is always true for EVERY value of its propositional VARIABLES. EXAMPLE − Prove [(A→B)∧A]→B is a tautology A Tautology is a formula which is always true for every value of its propositional variables. Example − Prove [(A→B)∧A]→B is a tautology

Answer»

A TAUTOLOGY is a formula which is always true for EVERY value of its propositional VARIABLES.

EXAMPLE − Prove [(A→B)∧A]→B is a tautology

A Tautology is a formula which is always true for every value of its propositional variables.

Example − Prove [(A→B)∧A]→B is a tautology

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