TL;DR: this works in a scenario where you must immediately choose one from a series of randomly ordered candidates of a known quantity. To optimize the probabil

TL;DR: this works in a scenario where you must immediately choose one from a series of randomly ordered candidates of a known quantity. To optimize the probability that your choice is the best candidate: 1. reject the first ≈ 37% of candidates; 2. choose the subsequent candidate that is better then any seen so far.