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Spacetime Paradox?

  1. Jun 23, 2004 #1
    In the Richard Feynman's Not-So-Easy Pieces, Feynman described the spacetime diagram is made up of three different regions:

    1. Space-like
    2. Affective Past
    3. Affective Future

    Feynman rised this problem

    If we were suddenly to become able to know things in the space-like interavals wouldn't that cause breakdown the principle of relativity? And the absolute speed of light in vacuum?
  2. jcsd
  3. Jun 23, 2004 #2
    Doesn't the Einstein-Podolski-Rosen conclusion say we can?

    If we receive a fast moving particle at home at a certain time and determine which spin state it has assumed, then we also know the simultaneous spin state of its creation-time partner way out in space at the same time. No?
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