Neil Armstrong claims that he actually intended to say, and thought he had said "That's one small step for a man, one giant leap for mankind" as opposed to the version we all know "That's one small step for man, one giant leap for mankind". Analysis of the recording is inconclusive -
http://www.cnn.com/2013/06/04/tech/armstrong-quote/
It got me thinking...what other commonly repeated quotes may in fact be misquotes? Any ideas?
This supposed Einstein quote springs to mind:
http://skeptics.stackexchange.com/questions/8742/did-einstein-say-if-you-cant-explain-it-simply-you-dont-understand-it-well-en
"Almost" Good Answers: