Inferences and Metainferences in ST

Pablo Cobreros, Paul Egré, David Ripley, Robert van Rooij

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1 Citation (Scopus)


In a recent paper, Barrio, Tajer and Rosenblatt establish a correspondence between metainferences holding in the strict-tolerant logic of transparent truth ST+ and inferences holding in the logic of paradox LP+. They argue that LP+ is ST+’s external logic and they question whether ST+’s solution to the semantic paradoxes is fundamentally different from LP+’s. Here we establish that by parity of reasoning, ST+ can be related to LP+’s dual logic K3+. We clarify the distinction between internal and external logic and argue that while ST+’s nonclassicality can be granted, its self-dual character does not tie it to LP+ more closely than to K3+.

Original languageEnglish
Number of pages21
JournalJournal of Philosophical Logic
Publication statusAccepted/In press - Sep 2020


  • Internal vs external logic
  • Metainferences
  • Paradoxes
  • Proof theory
  • Strict-tolerant logic

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