FA-26142 / Filter interfaces / Member archive

Normal form complements all child operators only under negation · case 02

Normal form complements all child operators only under negation is violated by the widget projection.

Member previewVariant 2 · 3 implementations · 10 checks per implementation

Case contract

Negating a filter group preserves its explicit wrapper; converting a negated group to normal form flips conjunction and complements every supported child operator atomically. This example checks: Normal form complements all child operators only under negation.

Why this case matters

Filter-widget state and serialization must preserve user constraints while the view changes.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
contract fixture 0	`{"complement-all": ["eq"], "negated-caption": "NOT (x)", "normal-form-mode": "or", "normalizable": true, "retain-wrapper": false, "wrapper-toggle": false}`	`{"complement-all": ["ne"], "negated-caption": "NOT (x)", "normal-form-mode": "or", "normalizable": true, "retain-wrapper": false, "wrapper-toggle": false}`	Failed

MEMBER ARCHIVE

The complete case is available to members.

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

Member access is invitation-based. Sign in with your invited account to inspect the sources.