  The reason for Weyl’s seeming reticence concerning the  ontological/epistemological questions about quantum reality was  already hinted at in note 5 of §2, where it was suggested that  Weyl was not especially bothered by the counterintuitive nature of  quantum mechanics because he held the view that “objective  reality cannot be grasped directly, but only through the use of  symbols”. Although Weyl (1948, 1949a, 1953) did express his  philosophical views about quantum theory, he did so cautiously. Weyl  (1949a, 263) summarizes some of the features of quantum mechanics  that he considered of “paramount philosophical  significance”: the measurement problem, the incompatibility of  quantum physics with classical logic, quantum causality, the  non-local nature of quantum mechanics, the Leibniz-Pauli  Exclusion Principle[107],  and the irreducible probabilistic nature of quantum mechanics. At the end of the summary Weyl remarks: 