Everyone says that brains are like computers. Well, maybe not everyone, but neuroscientists and philosophers of mind use this analogy in their attempts to understand how brains work. This is important information regarding the knowledge behind how people are actually able to concentrate and focus on their work from time to time. This is the type of information that is needed when people want to get focus supplements to help their brain work at the best possible level. On the face of it, the comparison is clear. We know what computers are and we know what brains are, after all. Just like we know that a rock is a rock and an apple is an apple and a democracy is a democracy, right?