Looking back, sunk cost fallacy has plagued my life for as long as I can remember it.

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Put something in, get something out.

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If nothing comes out, then what went in becomes useless. "Sunk cost," for no return.

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But how do we define return?

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Is it truly possible to put something in, and have nothing come out?

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In the most likely case, something did come out, but we were looking in the wrong place. Or, the wrong time.

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Alternatively, we saw something come out, but that something failed to meet our expectations.

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Sometimes, what comes out looks just like what we put in, spit back in our faces.

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And in rare cases, we walk away thinking that nothing came out, only for something to come out years later, long after we'd forgotten about what we put in.

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But something will always come out. Somehow, somewhere, some time.