General Theory
-a. Use $\textbf{ IP }$ to prove that the following argument is valid.
b. To illustrate how indirect proofs are a kind of shortened conditional proof, cross out the last line in the above proof and complete it as a conditional proof. (Hint: as an intermediate step prove .)

Question

General Theory
-a. Use $\textbf{    IP     }$  to prove that the following argument is valid.
  b. To illustrate how indirect proofs are a kind of shortened conditional proof, cross out the last line in the above proof and complete it as a conditional proof. (Hint: as an intermediate step prove  .)

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General Theory -A IP \textbf{ IP } IP

General Theory
-A $\textbf{ IP }$