Engineering vs. Sales
Yeah, I don't know what sort of metamorphasis that sort of creature goes through, but it seems to involve turning grey matter into tapioca. I recently got into a tussle with one such type (actually an outside rep). He insisted that the cost of a casting should be half of what was quoted (which was a reasonable quote) because he just KNEW IT SHOULD BE! His estimated cost was less than the cost of the steel.