My question was marked as an "exact duplicate" of another question. I feel it is different in two important ways and I've left a comment to that effect.
But then I read the duplicate message more closely. It instructs the writer to edit the question:
"This question was marked as an exact duplicate of an existing question. If this question is different, please edit it to explain how it is different or ask a new question."
Even if the question is not a duplicate after all, and if a mistake was made, the writer is asked to edit the question as if there is still something wrong with it. It's saying 'please fix your question to tell us why you don't think it needs fixing.'
Will my comment be seen and considered, or is it actually algorithmically necessary for me to edit the question to explain why I don't think it needs to be edited?