[nickelbob]

I had an otherwise very competent VP of Engineering who was enamored by a former employee. One day during our 1-on-1 we got to the topic of what we know for sure vs. what we don't. He said that he tried to avoid thinking about that because this former employee of his had told him of his own adventures with this train of thought and that it "took him to a very dark place".

Apparently he had never heard of Descartes? It was a great lesson in the fact that hubris is very real and just because you're good at one thing doesn't make you worth listening to on any other topic.