Above, I was just trying to tell you a little about relativity. As for its repercussions for free will, they are not certain. The theoretical framework of physics is not complete, and it may not have repercussions. It does have repercussions for our ideas of space, length and time. In fact, the different conception of what is happening when we look at the stars that I attempted to explain to you earlier is a perspective that helps us to overcome some of the contradictions that any messing about with the sequence of events would involve – events only appear to occur at different times from different points of reference. As soon as you come together to the same point of reference, you experience the same space-time, although your memory of previous events may be different.
You are right that a contradiction with free will has not been conclusively shown – yet – but, to touch on quantum mechanics, the phenomenon of quantum entanglement exemplified by the Schrodiger's cat experiment can currently only be understood in terms of three theories, each of which accounts for the experimental results, but none of which can be said to be 'true': (
here's the wiki page on it – it isn't brilliant but it explains the nature of the problem)
1. so-called 'spooky action at a distance', which would have implications for the linear flow of time, which the perspective I spoke of above would not resolve.
2. The existence of a multiverse – all possibilities are played out in an ever-multiplying number of universes.
3. Particles with mass travelling back in time, which would have really quite serious implications for, at the very least, the physical level that free will could operate on.
To be honest, I'm now regretting this diversion a little – at a certain level, cosmology reaches a point where the best fit theories are not regarded by anyone to be likely to be what is really going on (this isn't true of Relativity, many of whose predictions have now been demonstrated).
As for the rest of your argument in favour of the primacy of the existential viewpoint, I simply don't accept it. I can't argue with it any more – it's not how I approach my life.