two-out-of-three-set-algebra

Status: IN

The Two Out of Three solution expresses "appears in >= 2 of 3 arrays" as the union of all pairwise set intersections: `(s1 & s2) | (s1 & s3) | (s2 & s3)`.

Source: entries/2026/06/06/two-out-of-three-solution.md

Depended on by

• set-for-o1-membership-universal

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