Jan has interesting ideas, and a lot of them, but he doesn't do good experiments. This makes it hard to evaluate his interesting ideas. I've asked him a few times over the years to explain his experiments but he's declined. So now I just sorta think, "huh, that's an interesting idea" but until someone else replicates his experiments I mostly leave them in the "interesting idea" file. Sometimes that happens, and that's cool; sometimes it turns out that his experiment was bad. So I give him credit for interesting ideas but not dispositive proof.