2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/88919We give an explicit counterexample to an entanglement inequality suggested in a recent paper [quant-ph/0005126] by Benatti and Narnhofer. The inequality would have had far-reaching consequences, including the additivity of the entanglement of formation.references addedQuantum Physicstext