True, ALTHOUGH... hm - lets see if I can find the words: Ok.
  Going COMPLETELY hypothetical: IF... ...that which is "you" is
  really everything you've ever experienced, seen, heard, thought,
  all rolled into a thing you call your "me" AND.... ...it
  includes everything you WILL ever be aware-of in your lifetime
  and incorporate into you.... AND... ...you can't see my private
  mind and you are never privy to it in its entirety... ...THEN
  it's theoretically POSSIBLE that I am what you aren't, because
  that which is "me" _could_ incorporate everything in the entire
  UNIVERSE that you will never know, see, experience in any way at
  all. SO... in that sense, I *could* be everything you're not.
  But man, what a stretch that would be.