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Concurrent revisions are mistaken for causal successors · case 04

A scalar or lexicographic comparison imposes an order on independent replica updates.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Given two maps from replica ID to nonnegative counter, return equal, before, after, or concurrent. Before requires every component <= and at least one <; after is its inverse.

Why this case matters

Models conflict detection for replicated revisions; a total order can silently hide conflicts that require application-specific reconciliation.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
same-sum independent writes	`"equal"`	`"concurrent"`	Failed

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