Unfortunately, normal people do have to be reminded of the basics, because they seem statistically unable to process nuance in any argument they already have an opinion on. The whole idea of winning an argument is a kind of weird normie thing, a sportsball game with words, which is fine as entertainment, but problematic when it gets confused for reasoning about things.
Arguments as soldiers. Win at any cost, doesn't matter if what's said now contradicts what came before.
I didn't know about the idea until someone else explained it to me; talking about it with my much older brother, he had noticed it spontaneously.
Maybe it would be time for you to reflect on how much you implied in that simple sentence. None of what you said I implied or desired to do. It was simply my comment and opinion and contribution to the comment.
There's lots of dumb things "people in general" believe. The infamous list on Wikipedia[0] is just the tip of an iceberg. Everyone is vulnerable to this; if you aren't occasionally discovering and correcting such dumb "broadly known" things in your own beliefs, you aren't paying attention.
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[0] - https://en.wikipedia.org/wiki/List_of_common_misconceptions