@davidrevoy @breizh @Stem
@shironeko

I consider this guy a minor Fediverse celebrity. In case it helps shape the way you handle him, you might want to check out one of these threads:

* The poll he ran that he's referring to: https://dotnet.social/@SmartmanApps/117006976986454267
* Another thread which exemplifies his mathematical knowledge and attitude to views which differ from his own: https://dotnet.social/@SmartmanApps/115207044364101854
* Any other of his pinned posts with replies from other people.

I would never want to instruct anyone in how or whether to discuss with someone, but I think there is a certain pattern across these different subjects that can help you decide.

Full disclosure: I issue these messages somewhat frequently.