Re: Stupidity plus arrogance
Example time. Almost all readers here are probably ignorant regarding the details of splicing wire rope: most are probably unaware of the fact that it can be done, and is routinely done for some use cases. Does that make them stupid? I'd say no.
I would start to question how someone managed to avoid knowing things they should have needed in order to go through daily life or do their job, like a parent who have no idea of how to change a diaper, Exactly how an lawyer, who should have written a large number of documents while at law school, managed to avoid understsanding italics is left as an open question.