The Suppes-Zanotti inequalities involving the joint expectations of just three binary quantum observables are (re-)derived by the hull computation of the respective correlation polytope. A min-max calculation reveals its maximal quantum violations correspond to a generalized Tsirelson bound. Notions of "contextuality" motivated by such violations are critically reviewed.
Keywords: Born rule; Contextuality; Convex polytope; Greenberger-Horne-Zeilinger argument; Kochen-Specker theorem; Min-max calculation; Suppes-Zanotti inequalities.
© The Author(s) 2021.