(November 1, 2012 at 8:37 am)Kirbmarc Wrote: How does Feynman's quote contadict what I said?
EDIT: Even Feynman talks about "making a guess". There is no reference to "believing".
I didn't say it did. However, if I were to do so, I would say that it is rational to believe in what you believe to be probable and not rational to believe in what you consider improbable. Since there is a good probability that dark energy or something like it exists, it's rational to believe in it. It is also rational to believe in things we can detect and things we are certain of, but restricting belief to those categories is itself irrational. (Not to mention this is verging on the same error that the logical positivists made: we can't detect the truth value of the sentence, "It is irrational to believe in the undetectable," therefore it is irrational to believe it. [This is not to say it then becomes rational to believe in the undetectable, only that your sentence itself is self-refuting].)
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