Prove the logical truth.
1. P v ~ Q
2. ~ P v R
3. Q
4. P
5. R
6. Q ⊃ R
7. (~ P v R) ⊃ (Q ⊃ R)
8. (P v ~ Q) ⊃ [(~ P v R) ⊃ (Q ⊃ R)]
/(P v ~ Q) ⊃ [(~ P v R) ⊃ (Q ⊃ R)]
ACP
1,3 DS
2,4 DS
3-5 CP
2-6 CP
1-7 CP
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