Yep. As I recall, the origin of this idea comes from a series of competitions arranged by Robert Axelrod[1], where people submitted algorithms to participate in

Yep. As I recall, the origin of this idea comes from a series of competitions arranged by Robert Axelrod[1], where people submitted algorithms to participate in an Iterated Prisoner's Dilemma[2] situation. Tit-for-tat was one of the simplest algorithms submitted, but yet it won the contest. [1]: https://en.wikipedia.org/wiki/Robert_Axelrod https://en.wikipedia.org/wiki/Robert_Axelrod [2]: https://en.wikipedia.org/wiki/Prisoner%27s_dilemma https://en.wikipedia.org/wiki/Prisoner%27s_dilemma