You forgot a couple ...
| P and not Q | !(P -> Q) |
|---|
| F | F |
| T | T |
| F | F |
| F | F |
Hence, the relation holds.
Being right, does not endow the right to be rude; politeness costs nothing.
Being unknowing, is not the same as being stupid.
Expressing a contrary opinion, whether to the individual or the group, is more often a sign of deeper thought than of cantankerous belligerence.
Do not mistake your goals as the only goals; your opinion as the only opinion; your confidence as correctness. Saying you know better is not the same as explaining you know better.
I shouldn't have to say this, but any code, unless otherwise stated, is untested
