On 2/10/2012 12:51 PM, meekerdb wrote:

On 2/10/2012 5:26 AM, Stephen P. King wrote:Now we can quibble about this and discuss how in Special Relativistic situations we can indeed have situations there "X caused Y" is true for some frames of reference and "Y caused X" for some other frame of reference, but this dilemma can be resolved by considering the effect of a finite speed of light whose "speed" is an invariant for all observers, e.g. generalcovariance.## Advertising

This wrong. SR shows that it can be the case "X is before Y" in oneframe and "Y is before X" in a different frame moving relative to thefirst frame. This means X and Y are spacelike separated. But youcan't have "X caused Y" in one frame and "Y caused X" in another. "Xcaused Y" implies that Y is in the timelike or null future of X; arelation that preserved in all Lorentz frames.Brent

Hi Brent,

`Yes, you are correct. I was thinking of the scenario that Penrose`

`discussed in The Emperor's New Mind about the fleet of ships in Andromeda.`

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