Perhaps they couldn’t. I’m not sure what that has to do with anything.
I didn’t think that your argument could function on even a probabilistic level without the assumption that X-insanity is an objectively real type of insanity. On second thought, I think your argument functions just as well as it would have otherwise.
If it’s not an objectively real type of insanity, then I can certainly rule out the possibility that I suffer from it. If it is, then the assumption is justified.
I didn’t think that your argument could function on even a probabilistic level without the assumption that X-insanity is an objectively real type of insanity. On second thought, I think your argument functions just as well as it would have otherwise.
If it’s not an objectively real type of insanity, then I can certainly rule out the possibility that I suffer from it. If it is, then the assumption is justified.