You have no idea of what assertions I am qualified to make.

What I have professed on this topic in other threads hardly disqualifies me from continuing to inform people here of facts, as opposed to your anecdotal experiences. Your opinions are fine but the facts are that the screen is made of a hard material for a reason, but it isn't harder than most metals. Keep the screen clear of dirt (powdered Earth) and similar abrasives, and only use the Nokia stylus and the N800 screen will be fine. Stop your preaching please. You have been offering this anecdotal evidence and hearsay on your experiences, while some of us have science and experiences to boot that differ from your own.