Ok, so that makes my "AFAIK" statement incorrect, but that doesn't affect the point nor explain the down votes.
1) impolite. 2) your comments should concentrate on what you can add to the convo, not what others haven't.
I mean, it also doesn't help that your statement was incorrect (P-system as mentioned), but being rude in what is ideally a civil forum dedicated to a stated purpose is not helpful.