Streck postulates that at one time the Akkadian tense system consisted only of iprus, denoting priority in time, and iparras, denoting contemporaneity and posteriority
in time; iptaras existed only as a derived stem.
Discussing modal theory, Calvin Normore rightly takes his distance from the possible-world semantic model that has been imposed on Scotus, and he shows that Scotus never completely divorced time and modalities, "retaining a significant distinction between the modal status of the past and that of the future and the use of notions of priority and posteriority
modeled on temporal relations in his account of the contingency of the present" (p.
62) Scientists perceive and describe an aspect of this integral system in terms of a certain linear spatio-temporal order of priority and posteriority
governing things and events in nature, some of which they posit as antecedent 'causes' for others, the consequent 'effects', whereas in reality causal efficacy lies with God alone.
There is tension between any view which claims that the object denoted is all that names and simple referring terms contribute to propositions expressed by sentences in which they appear, and the apparent a posteriority
of identity statements containing different but codesignative names.
51) Hence, there would be a (real) distinction between an extrinsic act of cognition and any being of reason that might subsequently (with posteriority
of causal dependence rather than of time(52)) terminate it as an object.