2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/89446The concepts of complementarity and entanglement are considered with respect to their significance in and beyond physics. A formally generalized, weak version of quantum theory, more general than ordinary quantum theory of material systems, is outlined and tentatively applied to some examples.Revised version. Chapter 5.2 (old counting) omitted for separate publication, chapter 5.2 (new counting) reformulatedQuantum Physicstext