FA-17497 / Time representation / Member archive

Early uncertainty rounds inward or borrows late drift rate · case 02

The decoded time state disagrees with the explicit regression oracle for early_growth.

Member previewVariant 2 · 3 implementations · 11 checks per implementation

Case contract

Project a center with asymmetric early/late error through signed elapsed ticks. Error growth uses elapsed magnitude and independent parts-per-thousand bounds rounded outward. Return projected [low,high], full width, zero containment, earliest/latest signed query duration and strict certainty of preceding query.

Why this case matters

Clock transfer and timestamp consumers require preserved coordinate, phase, validity and elapsed-time semantics.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`[[9, 15], 6, false, [5, 11], true]`	`[[8, 15], 7, false, [5, 12], true]`	Failed

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