That's true multiple people could be working on the same problem, but I'd counter with two points. One, MySpace came first and solved a similar problem to Faceb

That's true multiple people could be working on the same problem, but I'd counter with two points. One, MySpace came first and solved a similar problem to Facebook, yet two totally different outcomes - execution is key. And two, I think the cool thing about sending problems not "business ideas" is that one problem statement could yield a thousand different solutions.