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Document Details :
Title: Brady's Deep Relevant Logic DR plus the Qualified Factorization Principles Has the Depth Relevant Condition
Author(s): MÉNDEZ, José M. , ROBLES, Gemma , SALTO, Francisco
Journal: Logique et Analyse
Volume: 232 Date: 2015
The 'depth relevance condition' (drc) is a strengthening of the 'variable-sharing property' (vsp). Deep relevant logics are logics fulfilling the drc, and Brady’s DR is a key item in this class. The 'qualified factorization principles' (qfp) are strong distribution principles. The qfp can be added to Relevance logic R without the result collapsing in a logic lacking the vsp. The aim of this paper is to show that DR (and any logic included in it) can be extended with the qfp, the drc being preserved.