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Sam Harris

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If someone doesn't value evidence, what evidence are you going to provide to prove that they should value it? If someone doesn’t value logic, what logical argument could you provide to show the importance of logic?
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"Is the Foundation of Morality Natural or Supernatural? – William Lane Craig vs. Sam Harris, University of Notre Dame, Notre Dame, Indiana, United States – April 2011

 
Sam Harris

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Schematically, the argument is as follows. Berkeley says: “Sensible objects must be sensible. A is a sensible object. Therefore A must be sensible.” But if “must” indicates logical necessity, the argument is only valid if A must be a sensible object. The argument does not prove that, from the properties of A other than its being sensible, it can be deduced that A is sensible. It does not prove, for example, that colours intrinsically indistinguishable from those that we see may not exist unseen. We may believe on physiological grounds that this does not occur, but such grounds are empirical; so far as logic is concerned, there is no reason why there should not be colours where there is no eye or brain.

 
George Berkely
 

Forgotten were the elementary rules of logic, that extraordinary claims require extraordinary evidence and that what can be asserted without evidence can also be dismissed without evidence.

 
Christopher Hitchens
 

The whole thing never happened and I can prove it — now. But Ira De Kalb made me wait a billion years to write the story.
So we start with a paradox. But the strangest thing of all is that there are no real paradoxes involved, not one. This is a record of logic. Not human logic, of course, not the logic of this time or this space.

 
Henry Kuttner
 

The biogeographic evidence for evolution is now so powerful that I have never seen a creationist book, article, or lecture that has tried to refute it. Creationists simply pretend that the evidence doesn’t exist.

 
Jerry Coyne
 

Put the money into schools. Rational ones that train young minds to think, to demand that persons in authority show the evidence for the ideas they push. Do that, and we won’t need to provide a world for the Sacred Brethren who, given the opportunity, would run everyone else off the planet.

 
Jack McDevitt
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