> Suppose I’m not familiar with him or am not convinced he’s a megalomaniac. (...) but what evidence would you present to convince me of that claim? Unless you

> Suppose I’m not familiar with him or am not convinced he’s a megalomaniac. (...) but what evidence would you present to convince me of that claim? Unless you are going to work for him, it is largely irrelevant whether he's a megalomaniac or not. He's a person that has produced very interesting and useful work (e.g., mathematica). You can take the good things about him and forget about his pompous/annoying stuff.