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
02.06.2026 | Brussels

Zusammenhalt, Vertrauen und Demokratie in Europa

Panel Discussion, Lecture

Vertrauen, Zusammenhalt, Demokratie – drei große Begriff, die in Europa derzeit allgegenwärtig sind. Doch wie belastbar sind sie eigentlich und was beschreiben sie? Was genau meinen wir eigentlich, wenn wir von politischem Vertrauen und gesellschaftlichem Zusammenhalt sprechen? Und braucht es – wie häufig behauptet – ein gewisses Maß an sozialer oder kultureller Homogenität, damit Vertrauen wachsen und Zusammenhalt entstehen kann? Diesen Fragen widmen wir uns in der aktuellen Ausgabe der Crisis Talks – auf dem Podium und im Gespräch mit unseren Gästen.

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Event
22.06.2026 | Frankfurt am Main

Rechtsextremismus und Polizei - Erscheinungsformen, Umgangsweisen, Perspektiven

Panel Discussion

Die Diskussion knüpft an den Sammelband „Rechtsextremismus als Herausforderung für Polizei und Gesellschaft“ an, der aktuelle Perspektiven aus Wissenschaft, Praxis und Zivilgesellschaft zusammenführt.

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News
18.05.2026

Videopodcast-Reihe „Our Planet, Our Health“ gestartet

Mit „Our Planet, Our Health“ startet eine neue Videopodcast-Reihe zu Fragen globaler Gesundheitsgerechtigkeit. Die Reihe, gehostet von Dr. Romina Rekers, ist eine Initiative des Global Health Justice Postdoctoral Programme (GHJ), gefördert von der Höppschen Stiftung.

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Publication
12.05.2026 | Online article

Disinhibited Informalization: Talk Radio, Bro Podcasts and the Aesthetics of Populism

This essay by Johannes Völz is a revised and updated translation of “Enthemmte Informalisierung: Talk Radio, Bro-Podcasts und die Ästhetik des Populismus,” WestEnd: Neue Zeitschrift für Sozialforschung 22.2 (2025): 3–24. It is published here as part of the b2o Review’s “Stop the Right” dossier.

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Event
27.05.2026 | Frankfurt

Von der Selbstermächtigung zum sozialen Widerstand

Lecture

Vortrag von Prof. Dr. Axel Honneth (Frankfurt am Main / New York Columbia University) mit anschließender Diskussion im Rahmen des Rechtstheoretischen Mittwochsseminars von Klaus Günther, Dan Wielsch und Benno Zabel.

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Event
25./26.06.2026 | Frankfurt

Shifting Regimes, Changing Orders

Conference

Conference as part of WDC2026 in collaboration with Deutsche Gesellschaft für Designtheorie und -forschung (DGTF), Kunstgewerbemuseum/Design Campus SKD and Design and Democracy

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Event
28./29.05.2026 | Frankfurt am Main

Global Health Justice: Principles and Practice

Conference

Following the research focus of the Global Health Justice Postdoctoral Programme, funded by Höppsche Stiftung, the "Global Health Justice: Principles and Practice" conference places a particular emphasis on themes such as the human right to health, political activism and health justice issues, and problems of structural injustice and vulnerable populations in health care. Keynote lectures by Jonathan Wolff and Kanchana Mahadevan. The Global Health Justice Programme and this conference are supported by the Höppsche Stiftung in Villmar.

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Event
14.07.2026 | Frankfurt am Main

Democracy Over Time and the Climate Crisis

Lecture Series

Vortrag von Anja Karnein (Binghamton). Die Vortragsreihe untersucht Fragen der Klimakrise als Herausforderungen für demokratische Gesellschaften und konzentriert sich auf Themen wie politische Legitimität, Widerstand gegen fossile Brennstoffe und die Interessen künftiger Generationen. Sie wird organisiert von Prof. Dr. Darrel Moellendorf und Dr. Lukas Sparenborg.

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