I'm partial to the metaphor I made up: They are search engines that can remix results. I like this one because I think most modern folks have a usefully accur

I'm partial to the metaphor I made up: They are search engines that can remix results. I like this one because I think most modern folks have a usefully accurate model of what a search engine is in their heads, and also what "remixing" is, which adds up to a better metaphor than "human machine" or whatever.