He uses the word "careless"
They are fighting because they are rivals.
<span>Aminadab is a total oddball character. There isn't a whole lot of text devoted to him in "The Birthmark," but what is there speaks volumes. Hawthorne describes Aminadab as "a man of low stature, but bulky frame, with shaggy hair hanging about his visage, which was grimed with the vapors of the furnace" . He is actually a little creepy, if not vaguely sinister. We learn that he isn't capable of understanding the science behind Aylmer's work, but that he can execute all the physical details easily. And then, of course, we have the very direct line.</span>
