Ah, right, I forgot you were fairly involved in investment stuff. Makes sense you'd understand the sunken cost thing is intended to apply there. I just wanted to make sure you weren't taking it to an extreme.

Outside of financing, I disagree that emotions should necessarily be discarded. Personally, if my emotions get me in trouble, I try to either update the data that the emotions came out of or I try to remember to be more logical for whatever type of matter it was. Most of the time, it is a choice to rely on emotions (I consider instinct and reflex as similar forms of non-logic), so one should take responsibility for that choice if it results in failure or trouble.

Although, similar to your Warren Buffett example, I think it's alright to fuck up a lot as long as you eventually straighten up. Some people are just slow learners, after all. Such a person should feel like a retard for wasting resources - and once a cetain threshold is reached on that waste, it becomes impossible to justify even with success. I'm reluctant to apply this strictly, because I see too many people give up where they're mis-evaluating their waste vs potential gain.