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Speciman comments on Timeless Causality - Less Wrong
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Comments (63)
Noether's theorem links symmetry to conservation laws. If you have an asymmetry in your causality, then you don't have conservation of energy anymore.
An exemple of such a system is Conway's game of Life, where you cannot always deduce the past state of the board from its future state. The sum total of all cells values in a Life board isn't constant over different time slices either, so no conservation there.
Is it possible that on that one you're still attached to one of those comfortable fuzzy thoughts ? Is there for instance a(n emotional) reason to value an universe in which there is causality over one where there isn't ?
The symmetry corresponding to conservation of energy is time translation, not time reversal. That said, I have other reasons to be doubtful of Yudkowsky's thesis here. In particular, I think it really does come down to entropy.