I can sign a document that says that I am the WORLD'S GREATEST BAGPIPE PLAYER!
Since it's nearly impossible to provide evidence to the contrary, the document in question, is DEFACTO PROOF.
Printed copy · Anthology Volume 4, page 461Printed copy from The Tender For Law Anthology, Volume 4, page 461 (printed 13 June 2014). Added by this site; not part of the Facebook export.