tea drinkers

As a foodie who enjoys American diners, a traveler who is grateful for being transported around the country, and even the world, by our nation's airlines, I beg you to stop offering me tea and then giving me something entirely different.
How does a hiring manager choose one person over another, assuming they're both equally qualified to do the work? Sometimes he has to rely on hunches, on a vague sense of a person's character. Sometimes it isn't even that scientific.