If I share my cake with you, I have given up a portion of my delicious cake I can no longer eat.
The cake is a lie!
the only unknown is when, but prediction doesnt carry a "when", only a statement that it will occur.
Herein lies the crux of the problem. If the when is "during my lifetime," then I might give a shit. Otherwise, I'll crank the A/C all the way down to 60, then drive my H2 to watch a NASCAR race. Hell, I might even burn a few science textbooks while I'm there; I hear it's a fun way to release some extra carbon.
Apart from at work, who uses email nowadays anyway?
PTO presidents and Cub Scout den leaders
First of all, there are several protesters who have been trying to police their own and talk people down. But if the bad protester is already committing acts of violence, trying to reign him in will get you hurt/killed by either him or the cops that come for him.
Second, police have a history of using agents provocateur as recently as the 2008 Republican Convention. And historically police have targeted left-wing protests for these sorts of incitements. I'm not saying that the Ferguson police are guilty of such a thing, but it's one of the reasons why policing your own people doesn't always work. That, and the folks are really, really, REALLY pissed off.
If it has syntax, it isn't user friendly.