Right, and importantly it's not just clinical insanity that is damaging. When you're working on a hard and important problem, any type of mental irregularity or paralysis is potentially very harmful. I suppose most people don't do the kinds of research where this is a real concern, but some do, and I figured it was important to address the small population of LW that might take one idea too many seriously and end up needlessly paranoid/depressed/etc because of a foolhardy desire to be completely 'rational'. The Litanies of Tarski and Gendlin have exceptions, but those exceptions should not justify excuses. If you do not heed the exceptions you won't be in a state to excuse yourself: the inferential distance would be too dangerous and too large.