Earlier quoted context omitted.
The world isn't full of binary people. There are lots of types of people in the world, and pigeon-holing any of them doesn't help them or you.
Obviously, it's an approximation. I'm sure you could very easily fit everyone you know in either of these buckets if you had to. And it's pretty accurate.
People are pretty dynamic, even if common traits exist (and "knowledge / seeking knowledge" is not citable), its a dumb claim.