Legal normativity and contestability

Project management: Prof. Dr. Marcus Willaschek

It is a special characteristic of law that the reasoning of legal judgments is not conclusive. This is demonstrated by the fact that in law there is always the possibility of refuting or challenging the application of a legal rule R by means of a reasoned exception to R. The exceptions to legal rules cannot be enumerated. The exceptions to legal rules cannot be enumerated.

The core objective of the project was to deepen our understanding of legal normativity by analyzing the contestability of legal justifications. In particular, the question of the relationship between contestability and indeterminacy was to be analyzed. Does the non-enumerability of exceptions also imply a normative indeterminacy of the situation?

The project was a contribution to the investigation of the normativity of normative orders and in particular to the sub-question of whether normative orders are subject to an incessant process of revision.

The project was carried out as part of the dissertation by project member Michel de Araujo Kurth and with the close support of PIs Marcus Willaschek and Klaus Günther. The basis was the previously compiled bibliography on the topic of contestability. Interim results were presented and critically discussed every six months at the research colloquium held by Prof. Dr. Marcus Willaschek. At a conference in March 2015, some of the project’s sub-questions were examined by renowned legal philosophers and moral philosophers. An essay by the project team member presenting the results of the project and an essay by Günther will also be published in an anthology accompanying the conference.

Based on an analysis of legal contestability, two levels of justification of judgments could be distinguished: a “rule level” and a “substantial justification level”. By analyzing the relationship between these two levels, it was possible to develop a novel approach to answering the question of the relationship between indeterminacy and contestability. According to this approach, contestability and legal indeterminacy are mutually exclusive, since contestability implies a stronger weighting of a judgment on the substantial justification level compared to the rule level and thus implies normative determinacy.

The most important publications of the research project:

Willaschek, Marcus (2013): Defeasibility in Philosophy, Knowledge, Agency, Responsibility, and the Law, special issue of Grazer Philosophische Studien, ed. by: C. Blöser/M. Janvid/H.O. Matthiessen/M. Willaschek, Amsterdam/New York: Rodopi, 2013.

Willaschek, Marcus/C. Blöser/M. Janvid/H. Matthiessen: “Introduction”, in: C. Blöser/M. Janvid/H.O. Matthiessen/M. Willaschek (eds.): Defeasibility in Philosophy. Graz Philosophical Studies , 87, 2013, S. 1-8.

Willaschek, Marcus: “Strawsonian Epistemology. What Epistemologists can learn from ‘Freedom and Resentment'”, in: Defeasibility in Philosophy. Graz Philosophical Studies 87, C. Blöser/M. Janvid/H.O. Matthiessen/M. Willaschek (eds.), 2013, pp. 99-128.

Willaschek, Marcus: “Morality without sanction? Notes on Julia Hermann and Mario Brandhorst”, in: E. Buddeberg/A. Vesper (eds.): Morality and sanction. A controversy about the authority of moral norms Frankfurt am Main: Campus, 2013.

de Auraujo Kurth, Michel: “Selected Thematic Bibliography of Work on Defeasibility in Philosophy and Related Disciplines”, in: Grazer Philosophische Studien 87, 2013, pp. 217-257.

The most important events in this project:

Workshop: Defeasibility in the Law (organized by Marcus Willaschek, Klaus Günther and Michel de Araujo Kurth, with presentations by: PD. Carsten Bäcker, Prof. Ruth Chang, Prof. Jonathan Dancy, Dr. Susanne Mantel, Prof. Josep Joan Moreso, Prof. Matthias Klatt, Prof. Andrei Marmor, Prof. Marcus Willaschek, Andreas Müller M. A., Michel de Araujo Kurth M. A.), Cluster of Excellence “The Formation of Normative Orders”, Goethe University Frankfurt am Main, March 12-13, 2015.

Panel: “Legal Indeterminacy in International law and Contemporary American Constitutional Law” at the Cluster Nachwuchskonferenz 2014 Praktiken der Kritik, Cluster of Excellence “Die Herausbildung normativer Ordnungen”, Goethe University, Frankfurt am Main, December 6, 2013.

people in this project:

Project management / contact person

Willaschek, Marcus, Prof. Dr.

Project staff

de Araujo Kurth, Michel

News from the research center

Event
10.02.2027 | Frankfurt am Main

Shifting Visions of Peace and Security

Panel Discussion, Lecture Series

Podiumsdiskussion im Rahmen der Ringvorlesung “Peace and Security in Post-Liberal Times” mit Lisbeth Zimmermann (Goethe University/Normative Orders), Antonia Witt (PRIF), Siddarth Tripathi (University of Erfurt). Moderation: Jonas Wolff (Goethe University/PRIF/Normative Orders).

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Event
03.02.2027 | Frankfurt am Main

AI, War, and Big Tech

Lecture Series, Lecture

Vortrag von Ingvild Bode (University of Southern Denmark)im Rahmen der Ringvorlesung “Peace and Security in Post-Liberal Times”.

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Event
16.12.2026 | Frankfurt am Main

International arms control in a world of uncertainties

Lecture Series, Lecture

Vortrag von Malte Göttsche (TU Darmstadt/PRIF) im Rahmen der Ringvorlesung “Peace and Security in Post-Liberal Times”.

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Event
02.12.2026 | Frankfurt am Main

Enabling Authoritarianism: UN Peacekeeping and the Politics of Authoritarianism

Lecture Series, Lecture

Vortrag von Sarah von Billerbeck (University of Reading) im Rahmen der Ringvorlesung “Peace and Security in Post-Liberal Times”.

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Event
25.11.2026 | Frankfurt

Deterrence in “Post-Liberal Times“

Lecture Series, Lecture

Vortrag von Maria Mälksoo (Copenhagen University) (Goethe-Universität/PRIF/Normative Orders) im Rahmen der Ringvorlesung “Peace and Security in Post-Liberal Times”.

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Event
18.11.2026 | Frankfurt am Main

The Case for (Neo)colonialism: Neotrusteeship in International Relations as the ‘Imperial Mind’ of the ‘Colonial Present’

Lecture Series, Lecture

Vortrag von Nick Lemay-Hébert (Manchester University) im Rahmen der Ringvorlesung “Peace and Security in Post-Liberal Times”.

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Event
28.10.2026 | Frankfurt am Main

Postliberal vs. liberal Perspectives on Peace and Security and Crises

Lecture Series, Lecture

Vortrag von Prof. Dr. Christopher Daase (Goethe-Universität/PRIF/Normative Orders) im Rahmen der Ringvorlesung “Peace and Security in Post-Liberal Times”.

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Event
02.02.2027 | Frankfurt

Klassenjustiz, race und abolitionistische Demokratie

Lecture Series, Lecture

Vortrag von Prof. Dr. Daniel Loick (Amsterdam) im Rahmen der Ringvorlesung "Ist das Recht am Ende?" im Wintersemester 2026/2027. Organisiert von Klaus Günther und Benno Zabel.

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Event
19.01.2027 | Frankfurt

Nach der Normativität. Zum Verhältnis von Politik und Recht unter komputationalen Bedingungen

Lecture Series, Lecture

Vortrag von Prof. Dr. Sabine Müller-Mall (Frankfurt am Main) im Rahmen der Ringvorlesung "Ist das Recht am Ende?" im Wintersemester 2026/2027. Organisiert von Klaus Günther und Benno Zabel.

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