articularly relevant) special case. 2.1.1 What Is General Intelligence? Many attempts to characterize general intelligence have been made; Legg and Hutter [LI107a] review over 70! Our preferred abstract characterization of intelligence is: the capability of a system to choose actions maximizing its goal

the sense in which humans are more intelligent than worms, which are more intelligent than rocks; and the sense in which theoretical AGI systems like Hutter’s AIXI or AIXI® [Hut05] would be much more intelligent than humans. But it misses essential aspects of the intelligence concept as it is used in the