I give up, after many, many years!

Jay Honeck:
MX is a lot of things -- impolite isn't one of them.

F. Baum:
Im gonna beg to differ with this one. A year ago or so I answered one
of his posts , which I ussually dont do, that had something to do with
airliners and balanced field length. He wrote back that I was wrong
and some theory that since pilots fly airliners into terain their
answers cannot be trusted. And I was polite to the guy ! (You are the
only one I call names on this list )

Frank, I agree w/you. It's a different version of impolite.

It's the inexperienced-yet-authoritative, condescending arguments and
tone with people who have actual experience and knowledge. It's the
practice of baiting with what appear to be innocent, genuine questions
only to courteously tell others who respond that they're full of sh*t.
It's not the more typical in-your-face name-calling; it's the
condescending blanket generalizations about people with *actual
experience* not having a clue while HE has a clear, accurate
understanding.

That's not as blatant or easily recognizable as "impolite" as calling
someone a "butthead", but it is impolite just the same, albeit more
cleverly so.