# René Descartes Lectures 2014

## Lectures and Presentations

Professor Leitgeb will deliver one lecture per
day. Each lecture will be followed by a discussion period and an invited
commentary, again followed by an open discussion.

### Monday, 20 October 2014

**Introduction** (presentation)

**Lecture
I: The Humean Thesis
of Belief **(presentation)

Abstract: This lecture develops
the theory that it is rational to
believe a proposition just in case it is rational to have a stably high degree
of belief in it. By means of the probability calculus, a particular
interpretation of David Hume's conception of belief in his "Treatise of
Human Nature" is explicated**.**

Commentators:

- Richard Pettigrew (Bristol) (presentation)

Contributed talks (abstracts):

- Pavel Janda (Bristol University): Reflection Principle and Epistemic Utility of Future Contingents
- Ted Shear and Branden Fitelson (Rutgers University): Diachronic Norms of Rational Full-Belief and the Pressure Toward Stability (presentation)
- Kevin Kelly and Konstantin Genin (Carnegie Mellon University): An epistemic justification of Ockham's razor
- Lasha Abzianidze (TiLPS): A Logic Belief with the Notion of Complexity
- Leszek Wronski (Jagiellonian University Krakow): Constraints on credences in two not mutually exclusive propositions: the search for the best belief update function (presentation)

### Tuesday, 21 October 2014

**Lecture
II: Stability and
Reasoning **(presentation)

Abstract: This lecture investigates the applications of the emerging theory for suppositional-inductive reasoning on the basis of the beliefs of an agent. The consequences are evaluated with respect to the epistemic accuracy of the acquired beliefs.

Commentators:

- Nina Gierasimczuk (ILLC/University of Amsterdam)
- Jan-Willem Romeijn (University of Groningen) (presentation)

Contributed talks (abstracts):

- Frederik Herzberg (Bielefeld University): A graded Bayesian coherence notion (presentation)
- Paul Thorn (Düsseldorf University): Another problem with deductive closure (presentation)
- Jan Sprenger (TiLPS): Hypothesis Acceptance and Degree of Corroboration
- Wolfgang Spohn (Konstanz University): The value of knowledge (presentation)
- Gerhard Schurz (Düsseldorf University): Impossibility results for stable rational belief

### Wednesday, 22 October 2014

**Lecture
III: Stability and
Action **(presentation)

Abstract:** **This lecture adopts a
more pragmatic angle and applies the belief stability theory to topics such as
acceptance, action, and assertion.

Commentators:

- Alexandru Baltag (ILLC/University of Amsterdam)
- Gerhard Schurz (DCLPS/University of Düsseldorf)

Contributed talks (abstracts):

- Roger Clarke (Queen's University Belfast): Contrastive Belief, Full and Partial (presentation)
- Weng Hong Tang (National University of Singapore): Belief and Conditional Certainty
- David Atkinson and Jeanne Peijnenburg (RU Groningen): Knowledge and Partial Knowledge