[kazinator]

> How can a human ever get better than their teacher?

By learning from other teachers, and by applying original thought. Also, due to innately superior intelligence. If your IQ is 140, and that of the teacher is 105, you will eventually outstrip the teacher.

[jibalt]

The question was rhetorical. And what is needed is aptitude for the specific task, not "IQ" ... the two are often very different.