Mark Williamson wrote:
Well, what if I know the truth, but it is not written anywhere? What if I interview 100 people to make sure they agree, and they do? What if it is common knowledge in my village, which nobody will challenge?
The answer: it will be labeled "unverifiable" or "non-notable" and deleted.
NOT NECESSARILY. If an article is based on oral sources, you could at least make a note that "the information is based on interviews with 100 people, made in the village of X between dates y and z. Copies of interviews are deposited at m." Then we'd know what is the factual basis, and the article could be useful as such.
Pekka Gronow