The tricky question is not why we can sometimes see non-locality, but why we see almost only locality. Why is everything so classical?
No, the case for dark matter is clear. There are definitely non-baryonic particles that only interact with us through gravity
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For a theory based on particles, yes ;-)
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if particles are just sets of typed properties that are stable for >1 step, it is not clear how to make theories without them
End of conversation
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