And then I discovered sky-writing -- a new medium that has since made my e-mailing seem as remote and obsolete as illuminated manuscripts. The principle is the same as e-mail, except that your contribution is "posted" to a global electronic network, consisting currently of most of the universities and research institutions in America and Europe and growing portions of the rest of the scholarly and scientific world. I'm not entirely clear on how "the Net," as it is called, is implemented and funded, but if you have an account at any of its "nodes," you can do skywriting too.

The transformation was complete. The radically new medium seemed to me a worthy successor in that series of revolutions in the advancement of ideas that began with the advent of speech, then writing, then print; and now, skywriting. All my creative and communicative faculties were focused on the lively international, interdisciplinary scholarly interactions I was having on the issues of intellectual interest to me at the time (which happened to arise from Searle's "Chinese Room Argument" and eventually came to be called the "symbol grounding problem"). Who needs conventional publication when, within a few hours, the "article" you post on the Net is already available to thousands and thousands of scholars (including, potentially, all of your intended conventional audience), who may already be posting back e-responses of their own? I was in the dizzying Platonic thrall of sky-writing and only too happy to leave the snail-like scope and pace of the old epistolary technology far below me.

But then something quite unexpected happened. With hindsight I can now see that there had already been some hints that not all was as it should be. First, veteran e-mailers and skywriters had warned me that I ought to restrict my contributions to the "moderated" groups. (Most of the subjects discussed on the Net -- including physics, mathematics, philosophy, language, artificial intelligence, and so on -- have, respectively, both a moderated and an unmoderated group.) I ignored these warnings because postings to the moderated groups are first filtered through a moderator, who reads all the candidate articles and then posts only those he judges to be of value. I reasoned that I could make that judgment for myself -- one keystroke will jettison any piece of skywriting that does not interest you -- and that "moderation" certainly isn't worth the huge backward step toward the old technology that the delays and bottle-necking would entail. And indeed the moderated groups carry much less material and their exchanges are a good deal more sluggish than the unmoderated ones, which seem to be as "live" and spontaneous as direct e-mail (but with the added virtue of appearing in the sky for all to see and contribute to).