So many choices. So many sorts of metrics, critics and measures.
Perhaps it makes sense to count things where the counting tells us how to do better next time.
And to count things that let us know how much risk we can take next time.
Or to calibrate our judgment about the market.
But it makes no sense at all to count things over which we have no control, and which teach us nothing about the future.
Counting our luck (good or bad) doesn’t make us luckier.
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