Is it one or four sets of rules of life? Same game

Imagine a game that is played, where the players play by four different sets of rules, and yet all players think that there is just one set of rules?

A rule set is built into each of the players, and a lifetime of experience with it makes it such that there is no question but that it is the rule set.

Observation of others, who, unknown to each person, are playing by a different rule set, decides that some others are dysfunctional in various degrees. At best, they concede a "double standard" that happens at times and certain circumstances.

Ah ... maybe it is the way the Creator makes the game stay spicy.