@memester,
I do not think that the question:
"If you are not confused, then why can't you be more specific?"
contains a claim. The question has several possible answers, including:
1. You are confused, so you can't be more specific.
2. You are not confused, but you can't be more specific as you have insufficient linguistic skill.
3. You are not confused, and you can be more specific but do not wish to be.
So the question allows that:
(a) you may or may not be confused, and
(b) you may or may not be able to be more specific.
Hence it is not
claiming (i) that you are confused, nor (ii) that you are not confused, nor (iii) that you can be more specific, nor (iv) that you cannot be more specific. There is nothing else that it could possibly be claiming; therefore, in my view, it is not claiming anything at all.