On 10/18/2018 8:07 AM, Bruno Marchal wrote:
Goldblatt, the modal logician who has studied S4Grz, but also the modal logic B and shown its relation with Quantum logics, which I use to extract quantum logic from arithmetic self-reference, has also studied a modality related to 4-dimensional Minkowski space-time (the modality is “now and forever”.
So this modality is derived from relativity theory. Does that show that relativity theory is ontologically prior to it?
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