[JepZ]

While I like your way of thinking, I don't think the argument applies. The game itself doesn't possess any kind of AI and is somewhat static, more like a sudoku book: There are lots of puzzles, but you know it when you have solved one.

The one-on-one tutor idea is that you have a master who sees the mistakes the student makes and gives him an exercise to target precisely the misconception the student might have in his head.

The Witness, on the other hand, doesn't possess such intelligence. Instead, it is a carefully crafted series of puzzles which slowly broaden the possible moves. Most of the time every next puzzle requires you to learn a new part of the rules. Sometimes you assumed that part anyway, and the puzzles are easy. But sometimes you have to find out that misconception in your head and replace it with something correct which makes the puzzle harder.

So one concept includes an intelligent observer while the other is more like a perfected text book.