Related:

• I do not know whether I was then a man dreaming I was a butterfly, or whether I am now a butterfly dreaming I am a man.
  -- Chuang-tzu...
• I do not know whether I was then a man dreaming I was a butterfly, or whether I am now a butterfly dreaming I am a man.
  -- Chang-tzu...
• Quote #496 "I do not know whether I was then a man dreaming I was a butterfly, or whether I am now a butterfly dreaming I am a man.
  -- Chang-tzu [Needed to understand a certain chapter title in a certain book by a certain well-known SF author....
• Grand Master Turing once dreamed that he was a machine.
  When he awoke he exclaimed: "I don't know whether I am Turing dreaming that I am a machine, or a machine dreaming that I am Turing!...
• I know and I know you know I know.
• Ever of thee I 'm fondly dreaming, Thy gentle voice my spirit can cheer.
  -- George Linley (1798-1865) -- Ever of Thee...
• I know so little, but I know it fluently...
• This is Unix... I know this.
• Don't I know you?