Consider:
Axiom l: s → l
Theorem l: p → q
Theorem 2: q → ~ t
Fill in the missing reasons in the two-column proof that follows.
Theorem: If p, then s is impossible.
Proof
Given: p
Prove: ~s
conclusions | justifications |
(1) p | Given |
(2)q | (a) ______ ? |
(3)~t | (b) ______ ? |
(4) ∴ ~s | (c) ______ ? |
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