FA-100104 / Preference pair construction / Member archive
Preference pairs: zero-confidence annotations count as preferences · case 04
zero-confidence annotations count as preferences.
Case contract
Rows are [id,score,confidence]. Confidence must be positive; return [best_id,worst_id] among eligible rows, or None below two.
Why this case matters
A small deterministic preference-data transform makes pair semantics inspectable without a training framework.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| zero confidence excluded | ["x4", "b4"] | ["a4", "b4"] | Failed |
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