2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/92636We prove here a version of Bell's Theorem that is simpler than any previous one. The contradiction of Bell's inequality with Quantum Mechanics in the new version is not cured by non-locality so that this version allows one to single out classical realism, and not locality, as the common source of all false inequalities of Bell's type.4 pages, no figure; Title, abstract and form of content revised to reflect several talks' feedback and to refine some arguments, in particular about the non-locality issue. Less background is assumed. The remark that the new inequality was not one of Boole's Conndition of Possible Experience was wrongQuantum Physicstext