Reminded of the discussion of survivorship bias in "Fooled By Randomness" (Taleb).

Something like a pool of 5000 investment managers each less likely to make a good decision than would a coin toss, would still produce a small population of "masters of the universe" after 5 years.

A similar technique was implemented and produced results using a Goldfish. [1]

[1] - https://www.youtube.com/watch?v=USKD3vPD6ZA [video] [warning:language]