SOPhiA 2013

Salzburgiense Concilium Omnibus Philosophis Analyticis

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Programm - Vortrag

Stabilität à la Douven & Meijs
(Erkenntnistheorie, Englisch)

Recently, Hannes Leitgeb has elaborated the idea of bridging the gap between qualitative and quantitative theories of belief. According to the first class of theories, believing that some proposition is true is a yes-no matter - an epistemic subject can either believe or disbelieve that it will rain tomorrow. According to the second class of theories, belief is a matter of degrees - an epistemic subject's belief that it will rain tomorrow can be more or less strong. By introducing a novel concept - the notion of a proposition's stability - Leitgeb has been able to define qualitative belief in terms of quantitative belief and thereby to weaken the tension between the two classes of theories of belief.

In my talk I present a generalization of Leitgeb's notion of stability, extending its applicability from single propositions to finite sets of propositions. Interestingly enough, this generalization establishes a conceptual connection to Igor Douven's and Wouter Meijs' work on coherence. It also sheds new light on Carnap's rather neglected notion of firmness. Using all these insights, I present a measure that can be understood as quantifying the mutual stability of a set of propositions. I show that this measure masters a certain class of test cases in which nearly all coherence measures proposed so far fail.

Chair: Dejan Makovec
Zeit: 14:00-14:30, 14. September 2013 (Samstag)
Ort: HS 105

Jakob Koscholke
(University of Oldenburg, Deutschland)

Jakob Koscholke (M.A.). University of Oldenburg. 2010 B.A. "Philosophie-Neurowissenschaften-Kognition" at the University of Magdeburg; 2012 M.A. "Logik" at the University of Leipzig. Thesis on a computational modelling approach to probabilistic coherence measures. Member of the DFG priority program "New Frameworks of Rationality" in the project "Probabilistic Models of Coherence and Positive Relevance".

Testability and Meaning deco