That's the rebuttal I thought about too. In particular, the heuristic "if someone is vocal against gays, they are likely to be gay" (whether or not it's true) may arise in practice from the heuristic "if someone is vocal about gays, whether for or against, they are likely to be gay".
I had the impression it arose from the heuristic "If someone makes a verbal status attack a low effort way to handle it is to attempt to reverse it". See also the ingenious reply to "X" that is "Your mom X".
See also: Boring Advice Repository, Solved Problems Repository, Grad Student Advice Repository, Useful Concepts Repository, Bad Concepts Repository
I just got back from the July CFAR workshop, where I was a guest instructor. One useful piece of rationality I started paying more attention to as a result of the workshop is the idea of useful questions to ask in various situations, particularly because I had been introduced to a new one:
"What skill am I actually training?"
This is a question that can be asked whenever you're practicing something, but more generally it can also be asked whenever you're doing something you do frequently, and it can help you notice when you're practicing a skill you weren't intending to train. Some examples of when to use this question:
Many of the lessons of the sequences can also be packaged as useful questions, like "what do I believe and why do I believe it?" and "what would I expect to see if this were true?"
I'd like to invite people to post other examples of useful questions in the comments, hopefully together with an explanation of why they're useful and some examples of when to use them. As usual, one useful question per comment for voting purposes.