English

Non-distributive relatives of ETL and NFL

Logic 2024-03-15 v1

Abstract

In this paper, we devise non-distributive relatives of Exactly True Logic (ETL) by Pietz and Riveccio and its dual (NFL) Non-Falsity Logic by Shramko, Zaitsev and Belikov. We consider two pre-orders which are algebraic counterparts of the ETL's and NFL's entailment relations on the De Morgan lattice 4\mathbf{4}. We generalise these pre-orders and determine which distributive properties that hold on 4\mathbf{4} are not forced by either of the pre-orders. We then construct relatives of ETL and NFL but lack such distributive properties. For these logics, we also devise a truth table semantics which uses non-distributive lattice M3\mathbf{M3} as their lattice of truth values. We also provide analytic tableaux systems that work with sequents of the form ϕχ\phi\vdash\chi. We also prove the correctness and completeness results for these proof systems and provide a neat generalisation for non-distributive ETL- and NFL-like logics built over a certain family of non-distributive modular lattices.

Keywords

Cite

@article{arxiv.2403.09137,
  title  = {Non-distributive relatives of ETL and NFL},
  author = {Daniil Kozhemiachenko},
  journal= {arXiv preprint arXiv:2403.09137},
  year   = {2024}
}