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Remembrance of things future
  1. Matthew C Kiernan
  1. Correspondence to Professor Matthew C Kiernan, Bushell Chair of Neurology, Brain and Mind Research Institute, University of Sydney, Sydney, NSW 2040, Australia; matthew.kiernan{at}

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There are moments in life for which most of us have shared a history—events that brought us together as a human collective: where were you when Neil Armstrong landed on the moon? Or when Elvis died? Or when you got that first glimpse of Borat's electric lime mankini? With few exceptions, everyone would have an answer.

However, can you remember what you did last Tuesday—not so easy, is it? and I suspect this is because last Tuesday was not a shared experience, not part of a collective conscious. It was merely one in a line of déjà vu experiences—a jumble of newspapers and breakfast bowls, traffic snarls, half-finished jobs and conversations.

But there is a question that has been pondered by almost everyone …

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  • Competing interests None.

  • Provenance and peer review Commissioned; internally peer reviewed.