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Imagine the possibilities: information without overload

Jago, Mark


Professor of Philosophy


Information is often modelled as a set of relevant possibilities, treated as logically possible worlds. However, this has the unintuitive consequence that the logical consequences of an agent's information cannot be informative for that agent. There are many scenarios in which such consequences are clearly informative for the agent in question. Attempts to weaken the logic underlying each possible world are misguided. Instead, I provide a genuinely psychological notion of epistemic possibility and show how it can be captured in a formal model, which I call a fan. I then show how to use fans to build formal models of being informed, as well as knowledge, belief and information update.


Jago, M. (2006). Imagine the possibilities: information without overload

Journal Article Type Article
Publication Date Apr 1, 2006
Deposit Date Apr 11, 2006
Publicly Available Date Oct 9, 2007
Journal Logique & Analyse
Peer Reviewed Not Peer Reviewed
Volume 49
Issue 196
Keywords Epistemic possibility, information, update semantics, resourse bounded agents, bounded rationality, information overload, logical omniscience
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