Thanks guys. It seems to me from you explanations that I am just going to have to memorize the fact that it is what it is...... I know in some of my other studies. Complex math and electronics that there are certain facts that just have to be memorized and for the sake of sanity you just have to believe it and not question it and use it in that manor. Is this one of those cases? Or am I just being dense? Or maybe I am suffering from information overload at this point. :confused: I will go on with my lessons and keep coming back to this and see if I can make more sense of it down the road.