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Dataset deduplication: case variants survive text-key deduplication · case 02
case variants survive text-key deduplication.
Case contract
Return the number of distinct Unicode case-folded strings. Whitespace and punctuation remain significant.
Why this case matters
This deterministic toy operation makes one dataset equivalence or representative rule explicit.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| ASCII case duplicates | 2 | 1 | Failed |
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