Some students look for answers in the back of the book and then figure out how to show work which gets those answers. If you do this long enough, it turns into

Some students look for answers in the back of the book and then figure out how to show work which gets those answers. If you do this long enough, it turns into a cult-like reverence for "the right/approved answers". Thiel's reasoning on one thing or another may be flawed, but he definitely doesn't work this way. And he has a ton of money. So that can make the back-of-bookers both irritated and resentful.