Iterated reflection over full disquotational truth

M. Fischer, C. Nicolai, L. Horsten

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Iterated reflection principles have been employed extensively to unfold epistemic commitments that are incurred by accepting a mathematical theory. Recently this has been applied to theories of truth. The idea is to start with a collection of Tarski-biconditionals and arrive by iterated reflection at strong compositional truth theories. In the context of classical logic, it is incoherent to adopt an initial truth theory in which A A and ‘ A A is truen’ are inter-derivable. In this article, we show how in the context of a weaker logic, which we call Basic De Morgan Logic, we can coherently start with such a fully disquotational truth theory and arrive at a strong compositional truth theory by applying a natural uniform reflection principle a finite number of times.
Original languageEnglish
Pages (from-to)2631–2651
JournalJournal of Logic and Computation
Volume27
Issue number8
DOIs
Publication statusPublished - 2017

Keywords

  • Truth
  • semantic Paradoxes
  • Basic de Morgan logic
  • reflection principles

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