Let us now look at the notion of meaning. Leaving aside subjects, objects and references to systems, one might define this notion by a purely modal-theoretical distinction between reality (actuality) and possibility (potentiality), as the specific notion that represents the unity of this difference. For something (whatever it may be) has meaning whenever it makes reference to other possibilities in actual experience or communication (in what then emerges). In particular, without this reference actuality would not at all be possible as meaningful actuality. By that account, and for an observer who makes such distinctions, meaning is the unity of the difference between reality and possibility.