2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91907The idea of writing a table of probabilistic data for a quantum or classical system, and of decomposing this table in a compact way, leads to a shortcut for Hardy's formalism, and gives new perspectives on foundational issues.LaTeX, 17 pages, 1 figure. Contribution to the conference ``Quantum Theory: Reconsideration of Foundations 2'' (Vaexjoe, Sweden, 2003). To appear in the Proceedings (the notation in this version has been slightly modified, and the references updated)Quantum Physicstext