If someone asks a question that is based on multiple premises, can a valid answer simply refute any of the premises? Specifically in a case where one premise appears to precede a second one, can a valid answer simply refute the second premise without noting that you should never even get to the second premise because the first premise is incorrect? Does it make a difference if the first premise has already been addressed in comments or other answers?
For reference, this is inspired by this answer to this question with the comments to the answer.