“Even if the absence of evidence for a given god were not evidence of its absence, it would still be evidence that the belief in that god is unreasonable. That's the only proposition that any atheist of any kind has to demonstrate in order to win the argument. Because anything beyond that… is just having fun.”
God, Atheism and Evidence, as Theoretical Bullshit, hosted on YouTube. (11 January 2010) http://www.youtube.com/watch?v=9stJ8h2ilZU
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Scott Clifton 8
American television actor, musician, internet personality. 1984Related quotes

“Absence of evidence is not evidence of absence.”
Martin Rees — Sagan refers to this quote in The Demon-Haunted World (1995) (see above)
Misattributed
Source: Cosmos

“Absence of evidence is not evidence of absence.”
As quoted in Project Cyclops: A Design Study of a System for Detecting Extraterrestrial Intelligent Life (1971) http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19730010095_1973010095.pdf by Bernard M. Oliver, and John Billingham, Ch. 2 : Life in the Universe, p. 3 ; this has frequently misattributed to Carl Sagan, who quoted it in some of his presentations.

The Art of Persuasion

" Believer Michael Robbins exhibits Maru’s Syndrome on The Dish http://whyevolutionistrue.wordpress.com/2014/07/26/believer-michael-robbins-exhibits-marus-syndrome-on-the-dish/" July 26, 2014

“Doctors most commonly get mixed up between absence of evidence and evidence of abense”

On Guard: Defending Your Faith with Reason and Precision (2010), p. 149

Referring to an aphorism of Martin Rees. (see Misattributed below)
Source: The Demon-Haunted World : Science as a Candle in the Dark (1995), Ch. 12 : The Fine Art of Baloney Detection, p. 221