Von Wright’s truth-logic and around

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А. С. Карпенко


In this paper von Wright’s truth-logic T′′ is considered. It seems that it is a De Morgan four-valued logic DM4 (or Belnap’s four-valued logic) with endomorphism e2. In connection with this many other issues are discussed: twin truth operators, a truth-logic with endomorphism g (or logic Tr), the lattice of extensions of DM4, modal logic V2, Craig interpolation property, von Wright–Segerberg’s tense logic W, and so on.


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А. С. Карпенко. Von Wright’s truth-logic and around // Логические исследования / Logical Investigations. 2018. Т. 19. № 1.