 In terms of ‘\(\mathbf{G}\)’, i.e., the strict relation of “grasping”, the weaker relation of “grasping” between a thinking being and an idea or proposition can be defined as follows: a thinking being \(x\) “grasps” (in the weaker sense of this word) an idea or proposition \(o\) iff there is a subjective idea or a judgment \(p\) in \(x\)’s mind such that \(p \mathbf{G} o\). The relation \(\mathbf{G}\) is the link between the mental phenomena of World 2 on the one hand and the World 3 of ideas and propositions on the other hand. Via relation \(\mathbf{G}\), items of World 3 can have a certain, non-causal influence on the mental phenomena of World 2, and these on their part stand in causal relations to other mental phenomena and also to the physical phenomena of World 1.