Facts vs. visions

Posted: August 28, 2014 at 3:31 a.m.

The political left has been campaigning against the use of force since at least the 18th Century. So it is not surprising that they are now arguing that heavily armed or aggressive police forces only inflame protesters and thus provoke violence. Statisticians have long warned that correlation is not causation, but they have apparently warned in vain.

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