JA I'd like to refer again to the source of that article which figures prominently in your remaining post but I don't have the reference. Would you let me have it so that I'll be prepared the soonest to respond. Also, do you have some training in, or exposure to, formal logic? Some of your post suggests that you do, which, if true, puts me at something of a disadvantage. Paul D Sick of deleting your inbox? Yahoo!7 Mail has free unlimited storage. http://au.docs.yahoo.com/mail/unlimitedstorage.html