But the internet makes it trivial to check these things, where it was decidedly nontrivial before. And the phenomenon of catchy quotes "hopping" to famous names is ancient, and probably why the great figures of history all seem so witty and smart.

When I was in high school someone quoted Churchill to me as having said (hilariously, I thought, and still do): "The pleasures of fornication are overrated and those of defecation underrated." But the internet tells me that Churchill probably never said this, nor the classic "up with which I shall not put" either (http://public.wsu.edu/~brians/errors/churchill.html). Sad, but better to know.