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My work is mainly within philosophical logic, in particular

•  involving 
• issues connected to

Talks at peer-reviewed conferences

• An inquiry into the logic subDLQ: , Taipei, 23.–25.10.25
• subDL is relevant: , St. Andrews, 19.05.25
• Entailment or implication?: , Troy NY, 14.–16.11.24
• The Significance of the Use Criterion: , Online, 10. & 18.11.22
• Supressing Irrelevance: , Online, 22.–24.06.22
• Logical Suppression Anew: , New York, 25.04.22
• MaGIC and Relevance: Interdisciplinary Research in Logic, Bergen 03.12.21
• Farewell to Suppression-Freedom (): , 24.03.21
• Classical Relevant Logics (): , Lisbon, 26.09.19–27.09.19
• Disjunctive Syllogism in Relevant Logics (): , Bergen, 28.05.19–29.05.19
• (): , Rio de Janeiro, 03.04.13–07.04.13

Public debate

• Øgaard, Tore Fjetland. 2016. Lomheims logikk. Klassekampen.

• VÃ¥r 2026: EXPHIL-JUSEM - Examen philosophicum, rettsvitenskp: seminar
• VÃ¥r 2025: LOG111/311 - Deduksjon og metalogikk: forelesning & seminar
• VÃ¥r 2024: LOG111/311 - Deduksjon og metalogikk: forelesning & seminar
• VÃ¥r 2023: LOG111/311 - Deduksjon og metalogikk: forelesning & seminar
• VÃ¥r 2022: LOG111/311 - Deduksjon og metalogikk: forelesning & seminar
• VÃ¥r 2021: LOG111/311 - Deduksjon og metalogikk: forelesning & seminar
• VÃ¥r 2020: LOG111/311 - Deduksjon og metalogikk: forelesning & seminar
• Høst 2019: EXPHIL-MNSEM - Examen philosophicum, realfag: seminar
• VÃ¥r 2019: LOG111/311 - Deduksjon og metalogikk: seminar

Academic article

Conference lecture

Academic book chapter

Doctoral thesis (PhD)

Letter to the editor

Journal review

_{^{The publications are arranged according to when they were first published; years in parenthesis are the issue-years (when available).}}

Accepted for publication

• Øgaard, T.F. (2026). Suppressing Irrelevance: Notes on Arnon Avron’s view of relevance. Logique et Analyse.

• 2026

• Øgaard, T.F. (2026). An inquiry into the logic subDLQ. Journal of Philosophical Logic. doi:
• Øgaard, T.F. (2026). subDL is Relevant. Journal of Logic, Language and Information. doi:

• 2025

• Øgaard, T.F. (2025). Models for Official entailment. Review of Symbolic Logic. doi:
• Øgaard, T.F; Standefer, S. (2025). Failures of γ. Studia Logica. doi:
• Øgaard, T.F. (2025). Entailment generalized. In: Sedlár, I., Standefer, S., Tedder, A. (eds) New Directions in Relevant Logic. Springer, Cham. doi:
• Øgaard, T.F. (2025). Withered relevance: evaluating the Anderson-Belnap account of relevant logics. In: Sedlár, I., Standefer, S., Tedder, A. (eds) New Directions in Relevant Logic. Springer, Cham. doi:
• Øgaard, T.F. (2024). Edwin Mares. The Logic of Entailment and its History. Cambridge University Press, Cambridge, UK, 2024, xv + 264 pp. The Bulletin of Symbolic Logic, 30(3), 422–424. doi:

• 2024

• Øgaard, T.F. (2025) Simplified semantics for further relevant logics I: Unreduced semantics for E and Π′. Logic and Logical Philosophy. 34(1): 109-151. doi:
• Øgaard, T.F. (2025) Simplified semantics for further relevant logics II: Propositional constants. Logic and Logical Philosophy. 34(2): 161-191. doi:

2023

• Øgaard, T.F. (2023) A Study in Relevant Logics. Bergen: University of Bergen (dissertation).
• Øgaard, T.F. (2023). Relevance through topical unconnectedness: Ackermann and Plumwood's motivational ideas on entailment. Australasian Journal of Logic. 29(2): 154–187. doi:  (Open Access).
• Øgaard, T.F. (2023). The weak variable sharing property. Bulletin of the Section of Logic. doi:  (Open Access).

2021

• Øgaard, T.F. (2022). Confused entailment. Topoi. 41(1): 207–219. doi:  ().
• Øgaard, T.F. (2021). From Hilbert proofs to consecutions and back. Australasian Journal of Logic.&²Ô²ú²õ±è;18:&²Ô²ú²õ±è;51–72.&²Ô²ú²õ±è;»å´Ç¾±:&²Ô²ú²õ±è; (Open Access).
• Øgaard, T.F. (2021). Non-Boolean classical relevant logics II: Classicality through truth-constants. Synthese.&²Ô²ú²õ±è;199(3–4):&²Ô²ú²õ±è;6169–6201.&²Ô²ú²õ±è;»å´Ç¾±:&²Ô²ú²õ±è; (Open Access).

2020

• Øgaard, T.F. (2020). Farewell to suppression-freedom. Logica Universalis. 14: 297–330. doi:  (Open Access).
• Øgaard, T.F. (2021). Boolean negation and non-conservativity I: Relevant modal logics. Logic Journal of the IGPL. 29(3), 340–362. doi:  ().
• Øgaard, T.F. (2021). Boolean negation and non-conservativity II: The variable sharing property. Logic Journal of the IGPL. 29(3), 363–369. doi:  ().
• Øgaard, T.F. (2021). Boolean negation and non-conservativity III: The Ackermann constant. Logic Journal of the IGPL. 29(3), 370–384. doi:  ().

2019

• Øgaard, T.F. (2021). Non-Boolean classical relevant logics I. Synthese. 198(8):&²Ô²ú²õ±è;6993–7024.&²Ô²ú²õ±è;»å´Ç¾±:  ().
• Øgaard, T.F. (2020). Substitution in relevant logics. Review of Symbolic Logic, 13(3), 655-680. doi:  ().

2017

• Field, H.; Lederman, H.; Øgaard, T.F. (2017). Prospects for a naive theory of classes. Notre Dame Journal of Formal Logic.&²Ô²ú²õ±è;58:&²Ô²ú²õ±è;461–506.&²Ô²ú²õ±è;»å´Ç¾±:&²Ô²ú²õ±è; ().
• Øgaard, T.F. (2017). Skolem functions in non-classical logics. Australasian Journal of Logic.&²Ô²ú²õ±è;14:&²Ô²ú²õ±è;181–225.&²Ô²ú²õ±è;»å´Ç¾±:&²Ô²ú²õ±è; (Open Access).

2015

• Øgaard, T.F. (2016). Paths to triviality. Journal of Philosophical Logic.&²Ô²ú²õ±è;45:&²Ô²ú²õ±è;237–276.&²Ô²ú²õ±è;»å´Ç¾±:&²Ô²ú²õ±è; ().