1. O ⊃ (Q • N) 2. (N Ú E) ⊃ S / O ⊃ S ---------------------------------- 3. ~O v (Q & N) 1 Implication 4. (~O v Q) & (~O v N) 3 Distribution 5. (~O v N) & (~O v Q) 4 Commutation 6. (~O v N) 5 Simplification 7. ~O v (N v E) 6 Addition 8. ~O --> (N v E) 7 Implication 9. O --> S 2,8 Hypothetical Syllogism QED.
1. O ⊃ (Q • N) 2. (N v E) ⊃ S / O ⊃ S 3. O ⊃ (N • Q) 1, commutation 4. O ⊃ N 3, simplification 5. O ⊃ (N v E) 4, addition 6. O ⊃ S 5,2, hypothetical syllogism Edwin
Number | Statement | Line(s) Used | Reason |
1 | O -> (Q * N) | ||
2 | (N v E) -> S | ||
:. | O -> S | ||
3 | ~O v (Q * N) | 1 | Material Implication |
4 | (~O v Q) * (~O v N) | 3 | Distribution |
5 | ~O v N | 4 | Simplification |
6 | (~O v N) v E | 5 | Addition |
7 | ~O v (N v E) | 6 | Association |
8 | O -> (N v E) | 7 | Material Implication |
9 | O -> S | 8,2 | Hypothetical Syllogism |