But your own example implies that you could've achieved the same results by simply using the "and" operator: ring AND mathematics. No reason to give up privacy.

But your own example implies that you could've achieved the same results by simply using the "and" operator: ring AND mathematics. No reason to give up privacy. I'm actually surprised that your friends didn't get the Wikipedia entry on "ring" among their top results. When I ran the search on both Google and Bing, it came up second.