Thanks Robert!
Interesting questions to think about. Getting to philosophy and six degrees of wikipedia come to mind but also the 20 questions game. I wonder if you could come up with a large but finite list of questions that, if you picked 20 of them, could point you to any person, place, thing, or concept. 20 questions sites like Akinator might keep a record of what questions get asked and how often new ones are needed. The subjectivity of language makes this kind of research very slippery though. I wasn't familiar with the basic research being done in the field of knowledge engineering before this project but it was relevant. Maybe there is some work on idea sets there.
