English

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"

R2 v1 2026-07-01T08:54:40.701Z