DP - no more Tiresome?That's a whole lot of words (and probably a whole lot of TIME spent looking up BIG words - Latin words even - in a dictionary (no doubt, in order to impress the great unwashed)) for someone who is so tired. /// I must admit, I am a commoner, and although I have taken a cruise on a ship (via Cardinal Cruises) I have never taken a course in Sailing or Shipbuilding. However, being the grandson of a farmer, and having spent many summers around farm animals, I DO KNOW what a HEAD is and on which end it is situated on a cow and a horse AND on a ship. (For some strange reason, whenever I read your posts, I seem to get an image of the posterior end of a horse.) If we are to make any HEADWAY in this discussion, you have to promise to stick around and not start whining whenever you start to feel uncomfortable. /// BTW - I took one course in symbolic logic many years ago - Textbook "Methods of Logic - 3rd edition - Willard Van Orman Quine 1972", but don't worry. That was so many years ago I've forgotten most of it.