Answer to Question #87464 in Philosophy for Jonas

Question

I Please prove each sequent. Each proof is worth up to 10 points.

1. A&B, B>C, C>D: A&D













2. A >(B>C) |- (A&B)>C













3. A>(B>C) |- ~C> ~(A&B)




4. ~A>B, B>D, D>A |- A














5. |- P>P

Answer 1

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