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Appeal to ignorance — the claim that whatever has not been proved false must be true, and vice versa (e.g. There is no compelling evidence that UFOs are not visiting the Earth; therefore UFOs exist — and there is intelligent life elsewhere in the universe. Or: There may be seventy kazillion other worlds, but not one is known to have the moral advancement of the Earth, so we're still central to the Universe.) This impatience with ambiguity can be criticized in the phrase: absence of evidence is not evidence of absence.
--
Ch. 12 : The Fine Art of Baloney Detection, p. 221

 

Carl Sagan

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We have two bits of evidence about the Somebody. One is the universe He has made. If we used that as our only clue, I think we should have to conclude that He was a great artist (for the universe is a very beautiful place), but also that He is quite merciless and no friend to man (for the universe is a very dangerous and terrifying place.) ...The other bit of evidence is that Moral Law which He has put in our minds. And this is a better bit of evidence than the other, because it is inside information. You find out more about God from the Moral Law than from the universe in general just as you find out more about a man by listening to his conversation than by looking at a house he has built.

 

C. S. Lewis

 

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.

 

Scott Clifton

 

The universe is the bible of a true Theophilanthropist. It is there that he reads of God. It is there that the proofs of his existence are to be sought and to be found. As to written or printed books, by whatever name they are called, they are the works of man's hands, and carry no evidence in themselves that God is the author of any of them. It must be in something that man could not make, that we must seek evidence for our belief, and that something is the universe; the true bible; the inimitable word, of God.

 

Thomas Paine

 

"The universe does not owe you a sense of hope. It could be that the world, the universe, is a totally hopeless place. I don't as a matter of fact think it is, but even if it were - that would not be a good reason for believing in God. You cannot say "I believe in X", whatever X is - God or anything else - "because that gives me hope". You have to say "I believe in X because there is some evidence for X". In the case of God - there is not a tiny shred of evidence for the existence of any kind of god.” ... “There's plenty of reason for hope in a Godless world. The universe is a beautiful place. The world is a beautiful place. To understand it in a clear-eyed, open-eyed way; to look out at the world and to really understand why we exist, what it's all about - that is a hugely uplifting feeling; That really does give a sense of worth to life, even if life itself is finite, as I believe it is. Nevertheless, it is not a hopeless life without a god, and to re-divert to my earlier point, even if it were - then it's just illogical to say that that gives you evidence for the belief in God."

 

Richard Dawkins

 

Human nature does change, and the fact that we’ve developed tools to direct that change is quintessentially human. And it must be a nearly universal concomitant to technological growth everywhere in the universe; otherwise there would be no universe. Unless we’re the only technological intelligence in the universe, Julian pointed out; so far there’s no evidence to the contrary. Maybe our own existence is evidence that we’re the first creatures to evolve far enough to hit the reset button. Somebody does have to be first.
But maybe the first is always the last.

 

Joe Haldeman