Translation: I haven't managed to convince you therefore you must be punished for your insolent behaviour of not being convinced by my arguments. I cannot walk away from this and leave you being wrong, you must profess to agree with me and if you are not rational enough to understand and accept logical arguments then you will be forced to profess agreement.

Who did you say hasn't learned how to lose?

I'm beginning to think that LW needs some better mechanism for dealing with the phenomenon of commenters who are polite, repetitive, immune to all correction, and consistently wrong about everything. I know people don't like it when I say this sort of thing, but seriously, people like that can lower the perceived quality of a whole website.

Warn, then ban the people involved.

If you decide that refusing to be convinced by evidence while also unable to convincingly counter it, and at the same time continuing to argue is bad form for the LW that you want to create, then stand by that decision and act on it.