Abstract
In this paper, we shall give another proof of the faithfulness of Blass translation (for short, B-translation) of the propositional fragment \(\mathbf{L}_1\) of Leśniewski’s ontology in the modal logic \(\mathbf{K}\) by means of Hintikka formula. And we extend the result to von Wright-type deontic logics, i.e., ten Smiley-Hanson systems of monadic deontic logic. As a result of observing the proofs we shall give general theorems on the faithfulness of B-translation with respect to normal modal logics complete to certain sets of well-known accessibility relations with a restriction that transitivity and symmetry are not set at the same time. As an application of the theorems, for example, B-translation is faithful for the provability logic \(\mathbf{PrL}\) (= \(\mathbf{GL}\)), that is, \(\mathbf{K}\) \(+\) \(\Box (\Box \phi \supset \phi ) \supset \Box \phi \). The faithfulness also holds for normal modal logics, e.g., \(\mathbf{KD}\), \(\mathbf{K4}\), \(\mathbf{KD4}\), \(\mathbf{KB}\). We shall conclude this paper with the section of some open problems and conjectures.
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Acknowledgements
I would like to thank Prof. Andreas Blass, Prof. Emeritus Mitio Takano, the late Prof. Stanislaw Świerczkowski and the late Prof. Emeritus Arata Ishimoto for their valuable comments, stimulation and encouragement. I would also like to thank, especially, the late Prof. Anne Troelstra and Prof. Dirk van Dalen for their encouragement. Further I appreciate anonymous referees for their comments to make this paper better.
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Inoué, T. On Blass Translation for Leśniewski’s Propositional Ontology and Modal Logics. Stud Logica 110, 265–289 (2022). https://doi.org/10.1007/s11225-021-09962-1
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DOI: https://doi.org/10.1007/s11225-021-09962-1
Keywords
- Leśniewski’s ontology
- Propositional ontology
- Leśniewski’s epsilon
- Modal interpretation
- Interpretation
- Translation
- Faithfulness
- Embedding
- Normal modal logic
- Modal logic K
- Hintikka formula
- Tableau method
- Provability logic
- Deontic logic
- Serial frame
- Transitive frame
- Irreflexive frame
- Euclidean frame
- Almost reflexive frame
- (almost) Symmetric frame
- Bi-intuitionistic logic
- Display logic
- Bimodal logic
- Multi modal logic
- Temporal logic