"A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools." - Douglas Adams

"A common mistake that people make when trying to design something completely foolproof was to underestimate the ingenuity of complete fools." - Douglas Adams, Mostly Harmless, 1992

"Never argue with a fool - people might not know the difference." - Anonymous

"A fool sees not the same tree that a wise man sees." - William Blake, The Marriage of Heaven and Hell

"Foolproof systems don't take into account the ingenuity of fools." - Gene Brown

"The greatest lesson in life is to know that even fools are right sometimes." - Sir Winston Churchill

"A fool must now and then be right, by chance." - William Cowper, Conversation

"If fifty million people say a foolish thing, it is still a foolish thing." - Anatole France

"If a million people say a foolish thing, it is still a foolish thing." - Anatole France

"A wise man gets more use from his enemies than a fool from his friends." - Baltasar Gracian, The Art of Worldly Wisdom

"None is a fool always, everyone sometimes." - George Herbert, Jacula Prudentum

"It's a good thing to be foolishly gay once in a while." - Horace

"Fools rush in where angels fear to tread." - Alexander Pope, An Essay on Criticism

"For take thy balance if thou be so wise And weigh the wind that under heaven doth blow; Or weigh the light that in the east doth rise; Or weigh the thought that from man's mind doth flow." - Edmund Spenser

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain, Following the Equator, Pudd'nhead Wilson's New Calendar

"Very often, say what you will, a knave is only a fool." - Voltaire

"Answer not a fool according to his folly, lest thou also be like unto him. Answer a fool according to his folly, lest he be wise in his own conceit." - BIBLE Proverbs 26:4

"A fool always finds a bigger fool to admire him." - NICOLAS BOILEAU, L'Art potique

"Fortune, that favors fools." - BEN JONSON, The Alchemist

"Any fool can tell the truth, but it requires a man of some sense to know how to lie well." - Butler, Samuel (1835-1902)

"The wise through excessive wisdom is made a fool." - Emerson, Ralph Waldo

"A fool's brain digests philosophy into folly, science into superstition, and art into pedantry. Hence University education." - Shaw, George Bernard (1856-1950)