Semi-separate exponence in cumulative paradigms. Information-theoretic properties exemplified by Ancient Greek verb endings

By using the system of Ancient Greek verb endings as a case study, this paper deals with the cross-linguistically recurrent appearance of inflectional paradigms that, though generally characterized by cumulative exponence, contain segmentable “semi-separate” endings in correspondence with low-frequency cells. Such an exponence system has information-theoretic properties which may be relevant from the point of view of morphological theory. In particular, both the phenomena of semi-separate exponence and the instances of syncretism that conform to the Brøndalian Principle of Compensation may be viewed as different manifestations of a same cross-linguistic tendency not to let a paradigm’s exponent set be too distant from the situation of equiprobability.