keyplyr - 6:31 am on Apr 11, 2002 (gmt 0)

Dr. Stephen Turner, author of analog says "Almost all ISP's now have their own cache. This means that if I try to look at one of your pages and anyone else from the same ISP has looked at that page recently, the cache will have saved it, and will give it out to me without ever telling you about it. (This applies whatever my browser settings.) So hundreds of people could read your pages, even though you'd only sent it out once."

At best, a server's access_log gives vague, inaccurate statistics. Still, I choose this method over cookies.