2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90501A proof is given, at a greater level of generality than previous 'no-go' theorems, of the impossibility of formulating a modal interpretation that exhibits 'serious' Lorentz invariance at the fundamental level. Particular attention is given to modal interpretations of the type proposed by Bub.14 pages, to appear in Foundations of Physics LettersQuantum Physicstext