C.S. Lewis put it this way. "Suppose after I balance my checkbook, I announce to you that I have very large check balance. You may decide this is only wishful thinking on my part, but the only way you'll ever know, is by checking my figures. Now, if it turns out that my math is right, any guessing that you do about my psychological state of mind as to whether I'm just imagining and wishing for a large balance is just flat out a waste of time. Now, if on the other hand, you look at the numbers, the figures and you prove that I'm wrong mathematically, you may find it interesting to explore the psychology of how and why I've deceived myself, but really only after you've done a proper investigation does it make any sense.

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