Происхождение еще одной "цитаты" из Черчилля

[v_s_c]

Черчилль никогда не говорил: "If you're not a liberal when you're 25, you have no heart. If you're not a conservative by the time you're 35, you have no brain."
http://www.winstonchurchill.org/learn/myths/myths/quotes-falsely-attributed-to-him

Нечто похожее: "Not to be a republican at 20 is proof of want of heart; to be one at 30 is proof of want of head". - говорил Гизо.
http://en.wikipedia.org/wiki/Fran%C3%A7ois_Guizot

Забавно, что авторство пытались приписать не только Черчиллю:
"This quote has been reworked many times, especially in reference to socialism and liberalism. It has been borrowed by or attributed to many notable figures who lived after Guizot, including Winston Churchill, George Bernard Shaw, Benjamin Disraeli, Georges Clemenceau, Otto von Bismarck, Aristide Briand, Woodrow Wilson, David Lloyd George, Wendell Willkie, William J. Casey, and others."

По наводке:
http://profpr.livejournal.com/281350.html