Including only material in an article which is within the accepted canon of knowledge is one of the Wikipedia editing guidelines. I think it means facts which are accepted by scholars in the field.
Fred
From: Michael Snow wikipedia@earthlink.net Reply-To: wikipedia-l@Wikimedia.org Date: Fri, 30 Jan 2004 21:34:40 -0800 To: wikipedia-l@Wikimedia.org Subject: [Wikipedia-l] Re: why an average person would wish to ruin a good article?
There's an ACCEPTED CANON OF KNOWLEDGE? Wow, I had no idea! Where is it, and how can I get my hands on it? Why hasn't anybody deleted everything in Wikipedia yet and replaced it with this CANON? (sarcasm alert)