Dear All,

I have the feeling that we have not sufficiently understood the consequences of
defining a spacetime snapshot in the genericity currently proposed. It can end up
in curious non-contiguous volumes, such as the multiple Chinese expansions into Vietnam,
which lacks an inner causality.
Following the principle not to model things we have not really understood in their
identity conditions and consequences, I suggest to restrict the notion of Snapshot
to the original utility, saying where something is within a particular timespan.

Best,

Martin
-- 

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