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"Either the thing is true, or it isn't. If it is true, you should believe it, and if it isn't, you shouldn't. And if you can't find out whether it's true or whether it isn't, you should suspend judgment. It seems to me a fundamental dishonesty and a fundamental treachery to intellectual integrity to hold a belief because you think it's useful, and not because you think it's true." (Bertrand Russel)