Restatement of: If you don't know the name of the game, just tell me what I mean to you. Alternative to: Why you must maximize expected utility. Related to: Harsanyi's Social Aggregation Theorem.

Summary: This article describes a theorem, previously described by Stuart Armstrong, that tells you to maximize the expectation of a linear aggregation of your values. Unlike the von Neumann-Morgenstern theorem, this theorem gives you a reason to behave rationally.¹