Will_Sawin comments on A summary of Savage's foundations for probability and utility. - Less Wrong
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Hmm. That's not quite the right description of the illogic but something very odd is going on:
Suppose I find A and B incomparable and B and C incomparable but A is preferable to C.
Joe is willing to trade C=>B and B=>A.
I trade C into B knowing that I will eventually get A.
Then, I refuse to trade B to A!
But if Joe had not been willing to trade B=>A, I would not have traded C=>B!