David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Ezio Di Nucci
Jack Alan Reynolds
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Journal of Philosophy 107 (3):115-143 (2010)
We consider a paradox involving indicative conditionals (‘ifs’) and deontic modals (‘oughts’). After considering and rejecting several standard options for resolv- ing the paradox—including rejecting various premises, positing an ambiguity or hidden contextual sensitivity, and positing a non-obvious logical form—we offer a semantics for deontic modals and indicative conditionals that resolves the paradox by making modus ponens invalid. We argue that this is a result to be welcomed on independent grounds, and we show that rejecting the general validity of modus ponens is compatible with vindicating most ordinary uses of modus ponens in reasoning.
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Teresa Marques (2015). Retractions. Synthese:1-25.
Fabrizio Cariani & Lance J. Rips (2016). Conditionals, Context, and the Suppression Effect. Cognitive Science 40 (3).
Benjamin Kiesewetter (forthcoming). How Reasons Are Sensitive to Available Evidence. In Conor McHugh, Jonathan Way & Daniel Whiting (eds.), Normativity: Epistemic and Practical. Oxford University Press
Nate Charlow (2013). What We Know and What to Do. Synthese 190 (12):2291-2323.
Fabrizio Cariani (2013). 'Ought' and Resolution Semantics. Noûs 47 (3):534-558.
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