giles
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(fd-distinct (list a b c ...)) imposes pairwise distinctness via O(n²) fd-neq constraints. Each fd-neq propagates independently when any pair becomes ground or has a domain-removable value. Tests: empty/singleton trivially succeed; pair-distinct/equal cover correctness; 3-perms-of-3 = 6 and 4-perms-of-4 = 24 confirm full permutation enumeration; pigeonhole 4-of-3 fails. 7 new tests, 610/610 cumulative.
1.3 KiB
1.3 KiB