Lieven Decock

prof. dr.

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Professor of Logic and Philosophy of the Cognitive Sciences

Department of Philosophy, Faculty of Humanities


Dean of the John Stuart Mill College





I started my career with a Ph.D. on Quine's ontology, and many themes of Quine's philosophy still play a role in my current work. I believe that philosophy is continuous with science, and most of my work is characterized by a combination of philosophical conceptual analysis, formal methods, and use of empirical data.

I have published in major philosophical journals such as Mind, Noûs, Philosophy and Phenomenological Research, and Philosophical Studies, as well as in interdisciplinary journals.


Research topics include:


- vagueness

- conceptual spaces

- ontological categories

- concepts and categories

- colour perception

- numerical cognition

- Quine scholarship



In previous years I have taught courses in logic, philosophy of science, and philosophy of mind in the bachelor and master programmes in the philosophy department, and introductory courses in philosophy of Artificial Intelligence and philosophy of mathematics in the Faculty of Exact Sciences. At present I teach:


- Ba1 PPE: PPE in Practice (on climate change)

- Ba2 Philosophy: Topics in the philosophy of the sciences



I studied theoretical physics and philosophy at the University of Leuven (Belgium). From 1992-1996 I worked as an astronomer at the Institute of Astronomy at the University of Leuven. I became a Ph.D. student in philosophy in 1997, and on December 3 1999, with promotor prof. dr. J. van Brakel,  I defended my Ph.D. thesis in philosophy, Trading Ontology for Ideology. The Interplay of Logic, Set Theory, and Semantics in Quine's Philosophy.


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Fingerprint Dive into the research topics where Lieven Decock is active. These topic labels come from the works of this person. Together they form a unique fingerprint.

Cognition Medicine & Life Sciences
Metaphysics Medicine & Life Sciences
Color Medicine & Life Sciences
Psychology Medicine & Life Sciences
Empirical Research Medicine & Life Sciences
Aptitude Medicine & Life Sciences
Physics Medicine & Life Sciences
Cognitive Science Medicine & Life Sciences

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Research Output 1995 2019

What Verities May Be

Douven, I. & Decock, L. B., 2017, In : Mind. 126, 502, p. 386-428 42 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Higher Order Vagueness
Indicative Conditionals
Sorites Paradox

Quine's "Strictly Vegetarian" Analyticity

Decock, L. B., 2017, In : The Monist. 100, 2, p. 288-310 23 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Language Change

What is graded membership?

Decock, L. B. & Douven, I. E. J., 2014, In : Noûs. 48, 4, p. 653-682 30 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Cognitive Science
Conceptual Space

Qualia Compression

Decock, L. B. & Douven, I. E. J., 2013, In : Philosophy and Phenomenological Research. 87, p. 129-150 22 p.

Research output: Contribution to JournalArticleAcademicpeer-review


Vagueness: A conceptual spaces approach

Douven, I. E. J., Decock, L. B., Dietz, R. & Egré, P., 2013, In : Journal of Philosophical Logic. 42, p. 137-160 24 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Conceptual Space

Activities 2004 2019

Varieties of conceptual change: the evolution of colour categorisation

Lieven Decock (Speaker)
8 Aug 2019

Activity: Lecture / PresentationAcademic

Frege's Theorem and Mathematical Cognition

Lieven Decock (Speaker)
5 Jun 2019

Activity: Lecture / PresentationAcademic

FWO (Research Foundation Flanders) (External organisation)

Lieven Decock (Member)
1 Jul 2019 → …

Activity: MembershipAcademic

The Metrical Structure of Colour Experience

Lieven Decock (Speaker)
9 Jul 2019

Activity: Lecture / PresentationAcademic

The varieties of conceptual change: the evolution of colour categorisation

Lieven Decock (Speaker)
7 Sep 2019

Activity: Lecture / PresentationAcademic