Publications: Information Closure and the Sceptical Objection
Forthcoming in Synthese
Preprint at: http://www.philosophyofinformation.net/publications/pdf/icso.pdf
Abstract
In this article, I define and then defend the principle of information closure
(PIC) against a sceptical objection similar to the one discussed by Dretske in
relation to the principle of epistemic closure. If I am successful, given that
PIC is equivalent to the axiom of distribution and that the latter is one of
the conditions that discriminate between normal and non-normal modal logics, a
main result of such a defence is that one potentially good reason to look for
a formalization of the logic of “S is informed that p” among the non-normal
modal logics, which reject the axiom, is also removed. This is not to argue
that the logic of “S is informed that p” should be a normal modal logic, but
that it could still be insofar as the objection that it could not be, based on
the sceptical objection against PIC, has been removed. In other word, I shall
argue that the sceptical objection against PIC fails, so such an objection
provides no ground to abandon the normal modal logic B (also known as KTB) as
a formalization of “S is informed that p”, which remains plausible insofar as
this specific obstacle is concerned.