What exactly do you mean by this? I don't have a good definition of "Evil payback." Can you give several examples? Your brain couldn't have literally leaked out of your ear, so I am going to need a more precise description of that feeling. Can you also provide a metric by which I can measure the magnitude of that feeling? Finally, what do you mean that we Engineers don't accept the obvious? If it is obvious then it doesn't need more explanation and we accept it. But if the explanation is sub-optimal then naturally we need a better definition, which also means that the explanation which you thought obvious is really non-obvious hence the request for additional clarification. Really I am just trying to get a precise and verifiable elucidation of your statements here. Thanks.