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Mark: No, I’ve never been able to make sense of the Transactional Interpretation in a block-universe context… I know John Cramer is aiming to reduce entangled states to coupled-single-particle states, which would certainly help, but I haven’t seen a mathematical framework for how he hopes to do this. Even in the single-particle case, I’m not positive that the all-at-once account holds together properly, but it’s hard to tell because most of the discussion typically uses this “pseudo-time” account you mention.
In general, as I see it, any approach that *requires* some “pseudotime”, “meta-time”, etc., to make sense of it is not in a Block Universe. (I call that the “two time trap”, in that essay I linked to up above.)