(Latin: [ˈsolwitur ambuˈlandoː]) - Saint Augustine Most hard problems are not solved by just looking at the equations; you have to think hard about them. You decided to work on something hard, you put in the time, and you even started writing about it. You broke the problem down to first principles, yet you still don’t understand how something is supposed to work. You hit a block, you reach a level of thinking that, at this moment, you are not progressing. It used to happen a lot when writing...