Churchill didn't say many things that weren't true.
It is a quote that is attributed to Churchill, but he didn't say it.
A man named Peter Rutland wrote a letter to the Washington Post
clearing up the origin of the 'Churchill quote':
?Charles Krauthammer [op-ed, May 25] quotes Winston Churchill as
saying, "If you're not a liberal when you're 20, you have no heart. If
you're not a conservative when you're 40, you have no head."
This quotation is frequently but mistakenly attributed to Churchill.
It is anyway unlikely that Churchill would subscribe to this
philosophy: He was a swashbuckling soldier at 20, and a Conservative
member of Parliament at 25. A couple of years later he switched to the
Liberal Party (which was not liberal in the modern sense), and later
went back to the Conservatives.
The phrase originated with Francois Guisot (1787-1874): "Not to be a
republican at twenty is proof of want of heart; to be one at thirty is
proof of want of head." It was revived by French Premier Georges
Clemenceau (1841-1929): "Not to be a socialist at twenty is proof of
want of heart; to be one at thirty is proof of want of head."
Washington Post
http://www.washingtonpost.com/ac2/wp-dyn?pagename=article&contentId=A43103-2001Jun8¬Found=true