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Show that [(a OR b) AND (a IMPLIES c) AND (b IMPLIES c)] IMPLIES c) is a tautology, using truth tables.

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Solution Summary

Validation of tautology is shown. The expert proves tautology using truth tables.

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In order to show that this is a tautology, or a compound proposition that is always true no matter what the truth values of the propositions that occur in it, we can set up a truth table and ...

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