Like Nancy said for the seond class of problems, but a little more generally, I’d preferentially pick the ones that I have rational reasons to suspect at the moment and that seem to be persisting for reasons that aren’t obvious to me (or aren’t rational), and ones that feel like they’re surviving because they exploit my cognitive biases and other undesirable habits like akrasia.
Like Nancy said for the seond class of problems, but a little more generally, I’d preferentially pick the ones that I have rational reasons to suspect at the moment and that seem to be persisting for reasons that aren’t obvious to me (or aren’t rational), and ones that feel like they’re surviving because they exploit my cognitive biases and other undesirable habits like akrasia.