What are "collective facts?" How do you distinguish "collective facts" from "alternative facts?"

It is hard to imagine a worse attempt at establishing a collection of commonly accepted truths than Wikipedia. Scientific journals are overwhelmingly better at weeding out falsehoods and hoaxes, despite the history of successful efforts to dupe reviewers. University libraries are also better at collecting knowledge, and in fact the entire industry of journal publishing began at university libraries. That knowledge is not locked away from the masses, it is just less convenient to access than Wikipedia.

Even Wikipedia has had to accept that a certain amount of oversight and review is necessary. There are some topics that attract bad actors, paid shills, state-sponsored propagandists, etc., and Wikipedia had to introduce "protected pages" to deal with such things. Add a structured review process and more rigorous citation requirements and those "protected pages" would be a lightweight version of academic publishing.