The most natural paradefinite logic relative to classical logic
Logic
2026-02-12 v2 Logic in Computer Science
Abstract
A paradefinite logic is a logic that can serve as the underlying logic for theories that are inconsistent or incomplete. A well-known paradefinite logic is Belnap-Dunn logic. Various expansions of Belnap-Dunn logic have been studied in the literature. In this note, it is argued that the most natural paradefinite logic relative to classical logic is the expansion of Belnap-Dunn logic with a falsity connective and an implication connective for which the standard deduction theorem holds.
Keywords
Cite
@article{arxiv.2601.04081,
title = {The most natural paradefinite logic relative to classical logic},
author = {C. A. Middelburg},
journal= {arXiv preprint arXiv:2601.04081},
year = {2026}
}
Comments
8 pages; minor revision of v1: all incorrect occurrences of "reversible" changed into "invertible"