"RS"? 

(Moved from User talk:Lexein. Doesn't belong on my talk page.   )
in the context of the claes oldenburg & coosje van bruggen articles, who or what is "RS"?

  

As an editor, you already know that RS is Wikipedia-editor shorthand for "independent reliable source", as in WP:RS. Every statement made in a Wikipedia article, unless it is an obvious one like "the sky is blue", should be WP:V verifiable (policy), meaning supported by independent WP:reliable sources (strong guideline). The more extraordinary the claim, the more reliable should be the sources. See also WP:VRS for a capsule summary. In other words, Wikipedia is not the authority which is speaking, the sources are. We paraphrase, quote, and cite them. What you wrote has not been explicitly discussed in the media (yet).
2nd point: we don't write about Wikipedia or internal matters unless independent reliable sources have done so; to do so again sets up WP (or an editor) as an authority. 
3rd point: See WP:BURDEN], which spells out that it is the duty of the adding editor to cite reliable sources supporting the claim.  If none exist, the claim must not be added to a Wikipedia article.