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Symbolic Logic: prove the following sequent is valid in PL: USE CP (CONDITIONAL PROOF) AND/OR Ev (DISJUNCTION ELIMINATION) Q -> R: (PvQ) -> (PvR) 1.
Symbolic Logic: prove the following sequent is valid in PL:
USE CP (CONDITIONAL PROOF) AND/OR Ev (DISJUNCTION ELIMINATION)
Q -> R: (PvQ) -> (PvR)
1. Q->R /Premise
2. PvQ /A for CP
3. P /A for Ev
4. PvR /Iv, 3
5. Q /A for Ev
6.
7.
8.
9. (PvQ) -> (PvR)
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