Full Idea
The view presented here presupposes that each logical concept is associated with some fixed and well defined collection of rules of inference which characterize its basic logical nature.
Gist of Idea
The nature of each logical concept is given by a collection of inference rules
Source
Fabrice Correia (On the Reduction of Necessity to Essence [2012], 4)
Book Reference
-: 'Philosophy and Phenomenological Research' [-], p.646
A Reaction
[He gives Fine's 'Senses of Essences' 57-8 as a source] He seems to have in mind natural deduction, where the rules are for the introduction and elimination of the concepts.