I wrote this answer and a user began arguing that my proof did not answer the poster's question. I tried very hard to explain that I thought it did. Of course I could be wrong; but nothing this user said made me want to change my argument. I'm fine with being criticised. Especially if it's constructive. I'm fine with the eventual downvote I got. I like getting points but that's not why I'm here.
There was another occasion where I was harangued, but in that case, it was constructive criticism and I did change my answer. It was annoying to keep getting notifications that I had a new response while I was trying to edit my answer, but that is a different topic.
My complaint is that, at some point, attempts to make an answer poster cbange their answer becomes harassment. I tried as hard as I could to avoid "Please avoid extended discussions in comments..." and failed.
My questions are:
At what point does a user's attempt to make me change my answer become out of line?
Does it matter is he is right and I am wrong?
What do I do when I feel it has become harassment?