Question: Use the short truth-table method to test the following for validity. Show your work. (a) (p q) ~r, (s p) (t q), s t /~r

Use the short truth-table method to test the following for validity. Show your work. (a) (p q) ~r, (s p) (t q), s t /~r (b) (p q) r, s ~t, r s, ~~t /p

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