> person or group of people that is willing to bang its head against a brick wall for hours on end, day after day, week after week, until the cracks finally sta

> person or group of people that is willing to bang its head against a brick wall for hours on end, day after day, week after week, until the cracks finally start to show This is what getting a PhD is like (at least in STEM). I mean, you do have to be smart, but you also have to be willing to work on a specific, technical, narrowly defined problem for years. It's great.