An expert guide to how conversation works, from how we know when to speak to why huh is a universal word We all had teachers who scolded us over the use of um, uh-huh, oh, like, and mm-hmm. But as linguist N. J. Enfield reveals in How We Talk, these "bad words" are fundamental to language.Whether we are speaking with the clerk at the store, our boss, or our spouse, language is dependent...