No, not something as rigid as Cyc, but more a system where you can trace the truth of a certain fact. Wikipedia requires you to reference sources. But that is just one layer. Some forms of knowledge are based on multiple layers of references. Making a statement based on a source, always involves some form of interpretation. It would be nice to know who made the statement (and who are supporting the interpretation). Of course, wikipedia keeps the full history of an article, and you could go back through all the revisions and see who edited what, but in requires a lot of work. It would be nice if Golden would at least acknowledge that traceability is an issue has some support for it.