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What are all the possible tautology, contradiction and contingency propositional expressions/formula's? Reminder: A tautology is a proposition that is always true. A contradiction is a

What are all the possible tautology, contradiction and contingency propositional expressions/formula's?

Reminder:

A tautology is a proposition that is always true.

A contradiction is a proposition that is always false.

A contingency is a proposition that is neither a tautology nor a contradiction.

I need to know all of the expressions for the three.

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