You've more or less summarized my major issue with him. He seems to have interesting things to say, but every time I read him I'm never sure to what extent I'm

You've more or less summarized my major issue with him. He seems to have interesting things to say, but every time I read him I'm never sure to what extent I'm listening to the voice of a mathematician or a salesman. He's the only serious-seeming mathematician/philosopher wannabe I've read that makes me want to check my wallet's still there, so to speak.