David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Ezio Di Nucci
Jonathan Jenkins Ichikawa
Jack Alan Reynolds
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Journal of Philosophical Logic 42 (2):317-334 (2013)
For deductive reasoning to be justified, it must be guaranteed to preserve truth from premises to conclusion; and for it to be useful to us, it must be capable of informing us of something. How can we capture this notion of information content, whilst respecting the fact that the content of the premises, if true, already secures the truth of the conclusion? This is the problem I address here. I begin by considering and rejecting several accounts of informational content. I then develop an account on which informational contents are indeterminate in their membership. This allows there to be cases in which it is indeterminate whether a given deduction is informative. Nevertheless, on the picture I present, there are determinate cases of informative (and determinate cases of uninformative) inferences. I argue that the model I offer is the best way for an account of content to respect the meaning of the logical constants and the inference rules associated with them without collapsing into a classical picture of content, unable to account for informative deductive inferences.
|Keywords||Content Information Deduction Inference Epistemic scenarios|
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Citations of this work BETA
Mark Jago (2013). Impossible Worlds. Noûs 47 (3):713-728.
Mark Jago (2015). Hyperintensional Propositions. Synthese 192 (3):585-601.
Mark Jago (2013). The Problem of Rational Knowledge. Erkenntnis (S6):1-18.
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