Comment by alfrednachos

What are humans specialized in doing? Because it seems to me that humans are pretty good at chess, calculus, social manipulation, flying to the moon, building machines that take us to the bottom of the ocean, discovering fundamental physics, etc. A fish, no matter what environment and upbringing you give it, can't do any of those things. So it seems like there's some dimension in which the human brain is more generally intelligent than a fish's.