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Dataset split: entity holdout selects a record instead of the whole entity · case 04

entity holdout selects a record instead of the whole entity.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Rows [id,entity]; hold out the lexically greatest distinct entity and return its IDs sorted.

Why this case matters

This toy split allocator makes membership rules explicit for reproducible evaluation fixtures.

One recorded failure

Sample boundary fixture

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

Boundary fixtureActualExpectedOutcome
entity rows scattered["c"]["b"]Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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