Hi. Thanks for the comment about writing...it does make a world of difference to take some time off from something you're working on and go back with a blank slate. For example, lastnight I was just "stuck" with everything (I'm noodling between multiple papers at the moment), so I just went out. This morn, I got up, opened one of the documents, and *voila*...the missing link was found. I typed a tidy paragraph and headed off to class feeling proud and much relieved. And I concur...I wish my TA's would give me extra credit for using Simpson's lingo. One can dream....