Thief of Time (Discworld, #26)

by Terry Pratchett

Most of the time I think he’s not all there. He never pays attention, he always knows the answers, and he can never tell you how he knows. We can’t keep thrashing him. He is a bad example to the other pupils. There’s no educating a smart boy.’

They were learning fast, or at least collecting data, which they considered to be the same as learning.