2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/125865Several concrete examples in quantum information are discussed to demonstrate the importance of proper modeling that relates the mathematical description to real-world applications. In particular, it is shown that some commonly accepted conclusions are not adequately supported by their purported justifications in the logical manner required.Conference Proceedings Article of an invited talk at QCMC2006; revised version with note added in Section 3Quantum Physicstext