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Decoding: Per-step acceptance record marks the rejected position as accepted · case 04

Per-step acceptance record marks the rejected position as accepted.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

For length m and rejection index k, return m booleans true exactly at indices less than k.

Why this case matters

A self-contained bookkeeping model makes prefix and token-count semantics observable without a model runtime.

One recorded failure

Sample boundary fixture

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

Boundary fixtureActualExpectedOutcome
middle rejection[true, true, true, false][true, true, false, false]Failed

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