Full Idea
According to the Peripatetics (Aristotelians), only syllogistic laws stated in variables belong to logic, and not their applications to concrete terms.
Gist of Idea
Syllogisms are only logic when they use variables, and not concrete terms
Source
JC Beall / G Restall (Logical Pluralism [2006], 2.5)
Book Reference
Beall,J/Restall,G: 'Logical Pluralism' [OUP 2006], p.19
A Reaction
[from Lukasiewicz] Seems wrong. I take it there are logical relations between concrete things, and the variables are merely used to describe these relations. Variables lack the internal powers to drive logical necessities. Variables lack essence!