Appeal to hypocrisy

[John V]

Sure John, that would work. Now lets consider that second half of yours.

A: You should not smoke. I do not smoke. If I smoked, I would have no basis to protest others' smoking.
B: But I have evidence that you smoke.

B still has no power to amend the bolded bit of A's statement (even assuming the claim was accurate). A may not have a basis to protest other's smoking personally (if, for example, they smoked, but that doesn't lead to or imply that no one does..or that there is a reason to or that you -should- smoke to begin with).

OK, we agree that A does not have a basis to protest others' smoking.

If B is not making a claim regarding the bolded part because he believes it's unprovable opinion, then no appeal to hypocrisy fallacy has been committed.