Already, by paying close attention to and interacting with the world and people around him, and without any school-type formal instruction, he has done a task far more difficult, complicated and abstract than anything he will be asked to do in school, or than any of his teachers has done for years.

And while he has been doing this, he has been learning other things as well, including many of the concepts that the schools think only they can teach him, and many that are more complicated than the ones they do try to teach him

The problem is more complicated than I thought.

He has tackled more complicated problems than this

The full details are complicated - the text alone runs to 385 pages–?and trying to summarise it is no easy task.