I found the question "What is wrong with this person?" quite interesting and some of the responses were insightful in this regard. We don't get to encounter extreme irrationality very often and I think the experience of failing to communicate is a good one to have occasionally. Being reminded what bad epistemic hygiene looks like is a great reminder to keep washing up. I also think one or two of the replies include good material to put on a Less Wrong intro/about/faq page if we ever get around to doing it.

The problem is that once you start arguing with someone giving up without resolution is like ending sex before orgasm. So it went on much longer than it should have.