So, the claim is (of course) not that intelligence is zero-one. We know that this is not the case, from the fact that some people are smarter than other people. As for the other two points, see this comment and this comment.
So, the claim is (of course) not that intelligence is zero-one. We know that this is not the case, from the fact that some people are smarter than other people.
As for the other two points, see this comment and this comment.