If is false, then one of the respective truth values of p,q and r are
T,F and F
F,F and T
F,T and T
T, F and T
| p | q | r | ||
| T | T | T | F | F |
| T | T | F | F | T |
| T | F | T | F | F |
| T | F | F | F | T |
| F | T | T | T | F |
| F | T | F | T | T |
| F | F | T | T | F |
| F | F | F | T | T |
| F | T | T |
| T | T | T |
| F | T | T |
| T | F | F |
| F | T | T |
| F | T | T |
| F | T | T |
| F | F | F |
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