IKT$^\omega$ and \L{}ukasiewicz-models
Logic
2021-04-30 v2
Abstract
In this note, we show that the first-order logic IK is sound with regard to the models obtained from continuum-valued \L{}ukasiewicz-models for first-order languages by treating the quantifiers as infinitary strong disjunction/conjunction rather than infinitary weak disjunction/conjunction. Moreover, we show that these models cannot be used to provide a new consistency proof for the theory of truth IKT obtained by expanding IK with transparent truth because the models are inconsistent with transparent truth. Finally, we show that whether or not this inconsistency can be reproduced in the sequent calculus for IKT depends on how vacuous quantification is treated.
Cite
@article{arxiv.2011.06991,
title = {IKT$^\omega$ and \L{}ukasiewicz-models},
author = {Andreas Fjellstad and Jan-Fredrik Olsen},
journal= {arXiv preprint arXiv:2011.06991},
year = {2021}
}
Comments
9 pages, to appear in the Notre Dame Journal of Formal Logic