  The second reason, Weyl says, consists in the radical new  interpretation of the wave function, which replaces the concept of  intensity with that of probability. It is only through such a  statistical interpretation that the corpuscular and atomistic aspect  of nature is properly recognized. Instead of a geometric  treatment of the classical field theory of matter, the new  quantum theory called for a statistical treatment of   matter.[74]  Already in 1920, Weyl (1920) addressed the relationship between  causal and statistical approaches to   physics.[75] 