Are you serious? Isnt well known (simpsons pointed this out last night) that they both left Harvard?
The Simpsons??? Are you serious? The point that I'm trying to make is that a school like Harvard (or Yale, Stanford, Princeton, UPenn) attract some of the best and the brightest students on the face of the planet because of their name and reputation for being the best.
Yes, Bill and Mark both both dropped out of Harvard's comp sci program but that's only because they had very viable and legitimate business platforms that monopolized their time and forced them to focus on their respective businesses full-time.