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Question 3 (20%) Give a formal proof that the following wff is a tautology by using CP (conditional Proofs). Do not use IP (indirect proofs)

Question 3 (20%)

Give a formal proof that the following wff is a tautology by using CP (conditional Proofs). Do not use IP (indirect proofs) and do not use T(tautalogies)

.(ABC)(B(AC))

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