The more precise with unexpected that prediction was before I made it, the better adapted my explanation is. Most good explanations don't have much reach or don't have any. We're trying to solve the problem of how to get the delivery person to deliver it to the right door. You might have a great solution to that but it may not have any reach at all. It may not even reach to your neighbor. So often we succeed in making good explanations, but rarely do they have much reach.