To me the most frustrating thing, here, are all those idiots out there who conflate acquired with accessible knowledge.
Searching for Explanations: How the Internet Inflates Estimates of Internal Knowledge
I think it becomes rude if you incessantly needle no matter what, but for the most part, I don't mind if someone constantly fact checks me or interrupts me to challenge a point before moving on to the next point, especially if the next point depends on acceptance of this prior point, but what irritates me is when someone continually reaches for their phone/Google to do it even after Google has already slapped them down once on a challenge. It's already annoying after one offense, and one strike is really enough. It becomes intolerable if they try it after failing twice.
"Look, if you're not
certain that I'm wrong, then work on your knowledge base or your retention. If I'm going to debate Google nobody needs
you. Kindly stfu."