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1. Use truth table to establish the Modus tollens tautology 2. Write Modus ponens in symbolic form and establish modus ponens tautology using truth table?

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1. Use truth table to establish the Modus tollens tautology 2. Write Modus ponens in symbolic form and establish modus ponens tautology using truth table? 3. What is contingency and write a truth table that is an example of contingency 4. What are the uses of derivation rules? Write one equivalence rule in symbolic form that we learned in class on Tuesday

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