decision fatigue, sunk costs, and other cheem-sounding words

So i found out today that some psychologists somewhere have come up with a new malady called 'decision fatigue'. It's amazing. There's always some new name, some new label, that one can attach to some human malfunctioning. Fascinating.
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Am also thinking about sunk costs, and how easy it is to slip into the sunk cost fallacy: thinking that just because we've already invested a lot in something (anything), it makes sense to continue investing even if we don't actually want this something, because, if we don't, we'd have wasted the initial investment.
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Ah life.
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