Online research in philosophy

Horacio Arlo-Costa. Full Belief, Supposition, and Personal Probablility.

Horacio Arlo-Costa. Belief Revision Conditionals: Models of Suppositional Reasoning.

Horacio Arlo-Costa. Non-Adjunctive Inference and Classical Modalities.

Horacio Arlo-Costa and Issac Levi. Contraction: On the Decision Theoretical Origins of Minimal Change and Entrenchment.

The "Ellsberg phenomenon" has played a significant role in research on imprecise probabilities. Fox and Tversky [5] have attempted to explain this phenomenon in terms of their "comparative ignorance" hypothesis. We challenge that explanation and present empirical work suggesting an explanation that is much closer to Ellsberg's own diagnosis.

Building on work that we reported at ISIPTA 2005 we revisit claims made by Fox and Tversky concerning their "comparative ignorance" hypothesis for decision making under uncertainty.