I think when intelligence is mentioned in these discussions it is implicitly defined as "being reasonably capable of doing everything a human can." However, in

I think when intelligence is mentioned in these discussions it is implicitly defined as "being reasonably capable of doing everything a human can." However, intelligence can also be defined as "the ability to maximize a risk/reward function." In this case, Kurzweil and Allen aren't referring to a specific function, so the first definition supersedes this second, more precise definition.