The rest were nondescript, as yet undifferentiated—yet nondescripts, thought Harriet, were the most difficult of all human beings to analyze. You scarcely knew they were there, until—bang! Something quite unexpected blew up like a depth charge and left you marveling, to collect strange floating debris.
Dorothy L. Sayers, Gaudy Night
analyzing, human-beings, human-nature, introverts, observation, observing, people