“He was smart if not exactly brilliant.” In this sort of expression, “if not” links a weaker with a stronger word with a related meaning. Other examples: “unattractive if not downright ugly,” “reasonably priced if not exactly cheap,” “interested if not actually excited.”But this sort of “if not” is often misused to link words that don’t form a weaker/stronger pair: “obscure if not boring,” “happy if not entertained,” “anxious if not afraid.” The linked terms in these examples do have some logical relationship, but they do not form a weaker/stronger pair.
Facebook
Twitter
Google +