iii. The distinction between a whole and a sum, holon and pan, totum and compositum, has been familiar since the time of Plato   and Aristotle  . But admittedly no one as yet knows anything about the systematics of the categorial variations which this division already embraces, nor have these been conceptualized. As an approach to a thorough analysis of the structures in question, cf. Edmund Husserl  , Logische Untersuchungen, vol. II, Untersuchung III: ‘Zur Lehre von den Ganzen und Teilen’. [BTMR  ]