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  text: '[summary:  A 'random utility function' is a utility function that's been drawn according to some simple probability measure over a logical space of formal, compact specifications for utility functions.  For example, we might say that a random utility function is a utility function specified by a random program drawn from the [5v algorithmic complexity] [27p prior] on programs.]\n\nA 'random utility function' is a utility function selected according to some simple probability measure over a logical space of formal, compact specifications of utility functions.\n\nFor example: suppose utility functions are specified by computer programs (e.g. a program that maps an output description to a rational number).  We then draw a random computer program from the standard [4mr universal] [27p prior] on computer programs:  $2^{-\\operatorname K(U)}$ where $\\operatorname K(U)$ is the algorithmic complexity ([5v Kolmogorov complexity]) of the utility-specifying program $U.$\n\nThis obvious measure could be amended further to e.g. take into account non-halting programs; to not put almost all of the probability mass on extremely simple programs; to put a satisficing criterion on whether it's computationally tractable and physically possible to optimize for $U$ (as assumed in the [1y Orthogonality Thesis]); etcetera.\n\n[5l] is the thesis that the attainable optimum of a random utility function has near-null [55 goodness] with very high probability.  That is: the attainable optimum configurations of matter for a random utility function are, with very high probability, the moral equivalent of [7ch paperclips].  This in turn implies that a [41l superintelligence] with a random utility function is with very high probability the moral equivalent of a [10h paperclip maximizer].\n\nA 'random utility function' is *not:*\n\n-  A utility function randomly selected from whatever distribution of utility functions may actually exist among agents within the generalized universe.  That is, a random utility function is not the utility function of a random actually-existing agent.\n- A utility function with maxentropy content.  That is, a random utility function is not one that independently assigns a uniform random value between 0 and 1 to every distinguishable outcome.  (This utility function would not be tractable to optimize for--we couldn't optimize it ourselves even if somebody paid us--so it's not covered by e.g. the [1y Orthogonality Thesis].)',
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