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sS ai_verbalizeAnalysisMap(Map<O, Set<S>> map) {
  if (map == null) null;
  if (empty(map)) ret "Map empty";
  if (l(map) == 1) ret "Only a single feature value (" + firstKey(map) + ")";
  bool disjoint = allSetsDisjoint(values(map));
  if (allSetsAreSingletons(values(map)))
    ret "Feature success! " + sfu(mapValues(f first, map));
  new L singletons;
  for (O key, Set<S> value : map) { if (l(value) == 1) singletons.add(key); }
  if (nempty(singletons)) ret "Clear feature values: " + singletons;
  if (disjoint) ret "No feature overlap";
  ret "Feature results inconclusive";
}