2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38481We comment on the recent paper (hep-lat/0005006) by Isgur and Thacker on the origin of the OZI rule in QCD. We show that instantons explain the sign and magnitude of the observed OZI-violating amplitude in all mesonic channels, not just in the $η'$ channel. We comment on the role of instantons in hadronic spectroscopy and the relation between instantons and the large $N_c$ limit of QCD.5 pages, 3 figuresHigh Energy Physics - LatticeHigh Energy Physics - Phenomenologytext