I think you need to go back and read what he actually wrote, because he very explicitly doesn't make the mistake you're talking about. (You might have guessed t

I think you need to go back and read what he actually wrote, because he very explicitly doesn't make the mistake you're talking about. (You might have guessed that from the fact that he bothers to say "a problem that's basically tractable by human intelligence ..." rather than, say, "any problem".) For instance, just a paragraph or two later than the bit you quoted: "If such higher types of intelligence can exist, and if a human-equivalent intelligence can build an AI that runs one of them — which is an open question".