It's impossible based on how Lemmy works on principle.

I have a rule, that if I'm debating with someone, and they use one of these things against me (or against someone else):

• calling up the post history (unless the receiver is an actual nazi, spambot etc.)

• making fun of grammar (unless the receiver deserves it, e.g. doing the same thing first)

• accusing of something bad or evil without any evidence, or being a total snowflake

• using "grand" words like disinformation, whataboutism or entitlement completely inappropriately, and to just shut the other person up

Then I consider the discussing immediately done, and I'm likely to block the person outright, because it's clear they only debate in bad faith and just use dirty tactics to make tgemselves feel better; so it's a waste of time to keep talking to them, and best to avoid ever getting into that situation with the person again.