What is authenticity? Is it even something real? Is it delusion?
   A convincing tool for rhetoric? What systems can be trusted for
   authenticity? What about flaws in those systems? Do the flaws
   invalidate the systems or is it acceptable to accept flawed
   systems for an authentic basis, if any such basis even is
   viable? Are you authentic? If so, what systems are your basis
   for your authenticity?
   Vague answers like "evidence and repeatability" are
   unacceptable. Name the systems you place your full confidence in
   that provides you authenticity, if any.