Modeling Deontic Inconsistency in Moral Dilemmas

Autores/as

DOI:

https://doi.org/10.51359/2357-9986.2025.263881

Palabras clave:

deontic logic, paraconsistent logic, philosophy of logic, moral dilemmas

Resumen

Paraconsistent deontic logics have been proposed to deal with deontic paradoxes. We argue that these systems have been misdirected when used to solve deontic paradoxes not grounded on deontic inconsistency. Although the solutions are a formally satisfactory way out of the paradoxes, philosophically they are unsatisfactory. As an example, we discuss how some paraconsistent deontic logics have dealt with Chisholm’s Paradox. A paraconsistent deontic logic should be used to solve paradoxes directly related to deontic inconsistency, as in the case of moral dilemmas. We show how some of these logics can model moral dilemmas while avoiding trivialization. We then consider the philosophical viability of their treatment of moral dilemmas. We argue that DPI  is a system that models moral dilemmas in a philosophically satisfactory way. We offer an interpretation for this system, which reads the operator ⊟ as formalizing non-dilemmatic situations. We discuss its philosophical consequences.

Citas

ANDERSON, Alan Ross; MOORE, Omar Khayyam. The Formal Analysis of Normative Concepts. American Sociological Review, [American Sociological Association, Sage Publications, Inc.], v. 22, n. 1, p. 9–17, 1957. ISSN 00031224. Available from http://www.jstor.org/stable/2088759. Visited on: 8 Aug. 2024.

ÅQVIST, Lennart. Deontic Logic. In: Handbook of Philosophical Logic: Volume 8. Ed. by D. M. Gabbay and F. Guenthner. Dordrecht: Springer Netherlands, 2002. P. 147–264. ISBN 978-94-010-0387-2. DOI: 10.1007/978-94-010-0387-2_3. Available from: https://doi.org/10.1007/978-94-010-0387-2_3.

ÅQVIST, Lennart. Good Samaritans, Contrary-to-Duty Imperatives, and Epistemic Obligations. Noûs, Wiley-Blackwell, v. 1, n. 4, p. 361–379, 1967. DOI: 10.2307/2214624.

ARENHART, Jonas Rafael Becker. The evidence approach to paraconsistency versus the paraconsistent approach to evidence. Synthese, Springer Nature, v. 198, n. 12, pp. 11537–11559, 2021. ISSN 00397857, 15730964. Available from: https://www.jstor.org/stable/48692779. Visited on: 12 Jan. 2025.

BARRIO, Eduardo; DA RE, Bruno. Paraconsistency and its Philosophical Interpretations. Australasian Journal of Logic, Victoria University of Wellington, v. 15, n. 2, p. 151–170, 2018. DOI: 10.26686/ajl.v15i2.4860.

BARRIO, Eduardo Alejandro. Models & Proofs: Lfis Without a Canonical Interpretations. Principia: An International Journal of Epistemology, Universidade Federal de Santa Catarina, v. 22, n. 1, p. 87–112, 2018. DOI: 10.5007/1808-1711.2018v22n1p87.

BATENS, Diderik. A completeness-proof method for extensions of the implicational fragment of the propositional calculus. Notre Dame Journal of Formal Logic, Duke University Press, v. 21, n. 3, p. 509–517, 1980. DOI: 10.1305/ndjfl/1093883174. Available from: https://doi.org/10.1305/ndjfl/1093883174.

MCGINNIS, Casey. Paraconsistency and deontic logic: Formal systems for reasoning with normative conflicts. 2007. PhD thesis–University of Minnesota.

MERLUSSI, Pedro. Há Dilemas Morais? Ethic@- An International Journal for Moral Philosophy, Universidade Federal de Santa Catarina, v. 12, n. 2, p. 207–226, 2013. DOI: 10.5007/1677-2954.2013v12n2p207.

MEYER, J.-J.Ch.; DIGNUM, F.P.M.; WIERINGA, Roelf J. The paradoxes of deontic logic revisited: a computer science perspective. [S.l.]: Utrecht University, Sept.1994. (Technical Report, UU-CS-1994-38).

PERON, Newton M.; CONIGLIO, Marcelo Esteban. Logics of Deontic Inconsistencies and Paradoxes. CLE e-prints, v. 8, n. 6, p. 10, 2008. Available from: https://api.semanticscholar.org/CorpusID:195876617.

PRAKKEN, Henry; SERGOT, Marek. Contrary-to-duty obligations. Studia Logica, v. 57, p. 91–115, 1 1996. DOI: 10.1007/BF00370671. Available from: https://doi.org/10.1007/BF00370671. Dyadic Deontic Logic and Contrary-to-Duty Obligations. In: Defeasible

Deontic Logic. Ed. by Donald Nute. Dordrecht: Springer Netherlands, 1997. P. 223–262. ISBN 978-94-015-8851-5. DOI: 10.1007/978-94-015-8851-5_10. Available from: https://doi.org/10.1007/978-94-015-8851-5_10.

PRIOR, Arthur N. Escapism: the logical basis of Ethics. In: Essays on Moral Philosophy. Ed. by Abraham Irving Melden. [S.l.]: University of Washington Press, 1958. chap. 6, p. 135–146.

RIBEIRO TELES, Eugênia. Uma possível solução para o problema da existência dos dilemas morais. Polymatheia- Revista de Filosofia, v. 12, n. 21, p. 48–69, 2021. Available from: https://revistas.uece.br/index.php/revistapolymatheia/article/view/5739.

RODRIGUES, Abilio; CARNIELLI, Walter. On Barrio, Lo Guercio, and Szmuc on Logics of Evidence and Truth. Logic and Logical Philosophy, v. 31, n. 2, p. 313–338, 2022. DOI: 10.12775/LLP.2022.009. Available from: https://apcz.umk.pl/LLP/article/view/37290.

ROSS, Alf. Imperatives and Logic. Philosophy of Science, [Cambridge University Press, The University of Chicago Press, Philosophy of Science Association], v. 11, n. 1, p. 30–46, 1944. ISSN 00318248, 1539767X. Available from: http://www.jstor.org/stable/184888. Visited on: 8 Aug. 2024.

ROSS, W. D. The Right and the Good.Some Problems in Ethics. [S.l.]: Clarendon Press, 1930. VAN FRAASSEN, Bas C. Values and the Heart’s Command. Journal of Philosophy, Journal of Philosophy Inc, v. 70, n. 1, p. 5–19, 1973. DOI: 10.2307/2024762.

WEBER, Zach. On Paraconsistent Ethics. South African Journal of Philosophy, The Philosophical Society of Southern Africa, v. 26, n. 2, p. 239–244, 2007. DOI: 10.4314/sajpem.v26i2.31477.

WILLIAMS, B. A. O. Symposium: Ethical Consistency. Aristotelian Society Supplementary Volume, Wiley-Blackwell, v. 39, p. 103–124, 1965.

WRIGHT, G. H. von. Deontic Logic. Mind, [Oxford University Press, Mind Association], v. 60, n. 237, p. 1–15, 1951. ISSN 00264423, 14602113. Available from: http://www.jstor.org/stable/2251395. Visited on: 16 Apr. 2024.

ZIMMERMAN, Michael J. Remote Obligation. American Philosophical Quarterly,

University of Illinois Press, v. 24, n. 2, p. 199–205, 1987.

Publicado

2025-12-04

Número

Sección

Perspectiva Contemporâneas em Filosofia da Lógica