But nature wasn't trying to create intelligence. Intelligence emerged because intelligent creatures lived long enough to pro-create and spread their genes.
Yes, evolution is a powerful force, but there's no particular reason that I'm aware of to think that we, as human, without our own intelligence and reasoning abilities, can't engineer other intelligences.
Yes, evolution is a powerful force, but there's no particular reason that I'm aware of to think that we, as human, without our own intelligence and reasoning abilities, can't engineer other intelligences.