The first two sentences of this statement first appear as attributed to France in the 1990s, but the full statement is earlier attributed to William Feather, as quoted in Telephony, Vol. 150 (1956), p. 23 http://books.google.com/books?id=Wm0jAQAAMAAJ&q=%22being+able+to+differentiate+between+what+you+do+know%22&dq=%22being+able+to+differentiate+between+what+you+do+know%22&hl=en&sa=X&ei=qYJOU9dAzoXRAYumgcAP&ved=0CMsCEOgBMDQ
Misattributed
“Do you really know what's going on And if you don't… find out”
Source: Mockingjay
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Suzanne Collins 554
American television writer and novelist 1962Related quotes
As quoted in Telephony, Vol. 150 (1956), p. 23 http://books.google.com/books?id=Wm0jAQAAMAAJ&q=%22being+able+to+differentiate+between+what+you+do+know%22&dq=%22being+able+to+differentiate+between+what+you+do+know%22&hl=en&sa=X&ei=qYJOU9dAzoXRAYumgcAP&ved=0CMsCEOgBMDQ; the first two sentences of this statement began to be attributed to Anatole France in the 1990s, but without any citations of sources.
Kōnosuke Matsushita in: Cherry blossoms and robotics, 1983; Cited in: John R. Schermerhorn (1993), Management for productivity, p. 170
“If you don't know everything, you must go on with what you do know.”
Rand al'Thor
Source: A Crown of Swords (15 May 1996)
7 Questions with Joe Strummer (15 August 2001)
"All You Have to Be is You" (11 December 2007) http://www.youtube.com/watch?v=WbyUCzBJVe4
“Sometimes you don't even know what you want until you find out you can't have it.”
Source: The Long Goodbye
The Secret Way of Wonder
On getting his own late-night program, Jimmy Kimmel Live! — reported in Alan Sepinwall (January 26, 2003) "A regular guy steps into stardom", The Star-Ledger, p. 1.
Source: Everybody’s Autobiography (1937), Ch. 3