The Stability Theory of Belief

Dados Bibliográficos

ID10692682
AutoresHannes Leitgeb (0000-0002-8276-149X, Ludwig Maximilians University, autor correspondente)
Ano2014
Volume123
Fascículo2
Páginas131-171
Data de publicação2014-04-01
Peer ReviewedSim
Open AccessNão
TipoARTICLE
PeriódicoThe Philosophical Review (JOURNAL)
Identificadores do periódicoISSN: 0031-8108 • E-ISSN: 1558-1470
EditoraDuke University Press (PUBLISHER • US)
DOI10.1215/00318108-2400575
OpenAlexW2010879042
IdiomaEN
Citações recebidas70
Referências citadas27

This essay develops a joint theory of rational (all-or-nothing) belief and degrees of belief. The theory is based on three assumptions: the logical closure of rational belief; the axioms of probability for rational degrees of belief; and the so-called Lockean thesis, in which the concepts of rational belief and rational degree of belief figure simultaneously. In spite of what is commonly believed, this essay will show that this combination of principles is satisfiable (and indeed nontrivially so) and that the principles are jointly satisfied if and only if rational belief is equivalent to the assignment of a stably high rational degree of belief. Although the logical closure of belief and the Lockean thesis are attractive postulates in themselves, initially this may seem like a formal “curiosity”; however, as will be argued in the rest of the essay, a very reasonable theory of rational belief can be built around these principles that is not ad hoc and that has various philosophical features that are plausible independently. In particular, this essay shows that the theory allows for a solution to the Lottery Paradox, and it has nice applications to formal epistemology. The price that is to be paid for this theory is a strong dependency of belief on the context, where a context involves both the agent's degree of belief function and the partitioning or individuation of the underlying possibilities. But as this essay argues, that price seems to be affordable. This essay develops a joint theory of rational (all-or-nothing) belief and degrees of belief. The theory is based on three assumptions: the logical closure of rational belief; the axioms of probability for rational degrees of belief; and the so-called Lockean thesis, in which the concepts of rational belief and rational degree of belief figure simultaneously. In spite of what is commonly believed, I will show that this combination of principles is satisfiable (and indeed nontrivially so) and that the principles are jointly satisfied if and only if rational belief is equivalent to the assignment of a stably high rational degree of belief. Although the logical closure of belief and the Lockean thesis are attractive postulates in themselves, initially this may seem like a formal “curiosity”; however, as I am going to argue in the rest of the essay, a very reasonable theory of rational belief can be built around these principles that is not ad hoc but that has various philosophical features that are plausible independently

Axiom · Closure (psychology) · Context (archaeology) · Economics · Epistemology · Nothing · Rational agent · Rationality · Theory · Artificial Intelligence · Computer Science · Epistemology, Ethics, and Metaphysics · Logic, Reasoning, and Knowledge · Mathematics · Philosophy