Suppose I think, after doing my accounts, that I have a large balance at the bank. And suppose you want to find out whether this belief of mine is "wishful thinking." You can never come to any conclusion by examining my psychological condition. Your only chance of finding out is to sit down and work through the sum yourself.

-- C. S. Lewis

This seems obviously false. Am I missing something?

1Jiro5ySomething can be wishful thinking and true at the same time. Doing the sum wouldn't prove that it's not wishful thinking. Of course having the sum be correct is a necessary condition for non-wishful thinking, but it does not determine the existence of non-wishful-thinking all by itself.

Rationality Quotes Thread March 2015

by Vaniver 1 min read2nd Mar 2015235 comments


Another month, another rationality quotes thread. The rules are:

  • Please post all quotes separately, so that they can be upvoted or downvoted separately. (If they are strongly related, reply to your own comments. If strongly ordered, then go ahead and post them together.)
  • Do not quote yourself.
  • Do not quote from Less Wrong itself, HPMoR, Eliezer Yudkowsky, or Robin Hanson. If you'd like to revive an old quote from one of those sources, please do so here.
  • No more than 5 quotes per person per monthly thread, please.
  • Provide sufficient information (URL, title, date, page number, etc.) to enable a reader to find the place where you read the quote, or its original source if available. Do not quote with only a name.