In Aristotelian logic, the analysis of a categorical sentence is tripartite, i.e., “subject”, “predicate,” and “copula”. In contrast, in modern logic- Fregean and Russellian- it is bipartite. i.e., “function” and “argument”. Although some writings by Aristotelian logicians mention bipartite analysis, scrutiny reveals that they still consider the copula, even if they hide it. This difference in analysis seems rooted in their approaches: the Aristotelian approach is linguistic, and the modern approach is semantic. In sum, we may say that the modern approach is more logical and has consequences that Aristotelian logic ignores.
