Sunk cost "fallacy" and spite are in the past, guilt and shame in the future wrt any decision. "Irrational" only in the short term.
@robamacl commitment signaling is a costly display of being a good cooperation partner - individuals benefit, no need for group selection
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@sarahdoingthing Good point. Have you read Robert Frank's "Passions within reason"? Emotions solve commitment prob. http://humancond.org/books/passions_within_reason … -
@robamacl no but independently arrived at same conclusion haha
End of conversation
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