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Great question...my response wasn’t super clear on that. I’d say 80th percentile of people who do a given activity. That’s, of course, pretty vague but this is just a guiding principle for me.

In the population that has actually ever done that thing. Or perhaps currently does that thing on an at least seldom basis.

Only 4% of the world even plays soccer.

Being in the top 10% of them puts you into global fractional percentages.

If it's not soccer, having done it likely puts you in fraction-of-fraction land.

Yeah it takes like a weekend of practice or study at many things to reach the 99th percentile. Most stuff’s not that widely practiced or known.