It's the depression. It zaps your brain of the ability to concentrate on things and problem solve. I know that there is a long biological explanation for this which has to do with the areas of the brain affected by depression. I've always looked at it from the standpoint of cognitive economy. That is, you have 100% of your brain to use for all that you use your brain for...if you are depressed, you spend about 80% of that brain trying to fight off depression. As a result, everything else suffers...