 In order to account for these effects, Stein introduces the notion of “causality of the experiential domain”. “Experiential causality” (Erlebniskausalität) is different from “mechanical causality” but may still be viewed as an “analogon of causality in the realm of physical nature” (1922: 16–17[15]. According to Stein’s somewhat idiosyncratic description compared to the classical Humean conceptions, there is a tripartite chain of events in mechanistic causation: 