If you find that your logic gives you contradictory results, then you probably started out wrong. Go back and re-examine the assumptions you started out with, and you'll find that one is wrong.
Madness string 26050
Saying, 'but it's always been done this way' and, 'but that thing has been here for years' is not an answer nor a reason. Don't fix something that isn't broken, but if it's not working, something has to change.