The professional search engines certainly do. Google must, although they don't skite about it. So does Lycos, and they do skite about that. Read all about it at:
http://www.lycos.com/help/boolean_help.html

They use the more advanced operators to be able to assign probabilities of match or percentage of match to work out what order in which to return the pages found. And they have to do it quickly! Most of the advanced operators (such as ADJ, NEAR, FAR, SAME) are not actually Boolean at all, but have been developed as part of search engine logic.


The idiot also known as Capfka ...