If a coherent physical world-description requires no primitive temporal extension, then reidentification over time is a derived convenience, not a necessary condition for world-hood.

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coherent(de Finetti's usage in the context of the Dutch Book argument for probabilism): A subject is coherent if their unconditional degrees of belief do not permit a Dutch Book (a guaranteed loss through a combination of bets) to be made against them
derived convenience(suggesting that recognizing sameness across time might be practical but not essential to reality): Something that is useful or helpful but not fundamentally necessary—it comes from combining other more basic things.
necessary condition(Counterfactual analysis of causation; Mackie 1965, 1974): A condition C is necessary for event E if E would not have occurred in the absence of C
physical world-description(what physicists and philosophers try to create to understand reality): A complete explanation or model of how the physical universe works and what exists in it.

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