 Yes, look. The word look answers the pop necessity of simulating gravitas and thoughtfulness amidst the inane palaver of politicians, newscasters, TED talkers, professors, and other chaff mongers. It commands attention, serves as a fanfare for the common manifesto that follows. Look also gives the speaker a moment to concoct the very twaddle that will comprise the subsequent hum drumming and help you both pretend it's something fresh and useful. That's what I call... Necessity.