Maybe it would be clearer if I said Prolog was being used like a "much" more powerful version of Awk / Perl. Consider the server log case I mentioned. A question you might ask of a server log is: Are there any client requests that were not served? That query is an easy one-liner. You can go a little further and say: Give me the IPs of all the client requests that were not served. That query is also easy, maybe just another line or two. It would be a lot harder to get that information with Awk etc, but the spirit is the same: you have a bunch of data, and you want to extract some particular information, and you want to do so without a lot of pomp.
