Question: 1.~(t b) hyp. 2.~b ~s, hyp. 3. s ~p. hyp. 4. ~t ~b 1, DeMorgans 5. t ~b 4, Implication 6. ~s ~p 3, Implication

1.~(t b) hyp. 2.~b ~s, hyp. 3. s ~p. hyp. 4. ~t ~b 1, DeMorgans 5. t ~b 4, Implication 6. ~s ~p 3, Implication 7. ~b ~p 2, 6, hypothetical Syllogism 8. t ~p 5, 7, hypothetical Syllogism 9. p ~t 8, Contrapositive Do the question like the above

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