Well, that it did produce intelligence once; not that it necessarily always does. Although I do tend to think that given enough time (some millions of years),

Well, that it did produce intelligence once; not that it necessarily always does. Although I do tend to think that given enough time (some millions of years), other intelligence will evolve on earth, from parrots or elephants or dolphins or octipuses or something. Though there's no evidence of a brain growth spurt that led to us, in other species; and it's not settled why we had it.