Synthese:1-19 (forthcoming)

Suki Finn
Royal Holloway University of London
In this paper I argue that pluralism at the level of logical systems requires a certain monism at the meta-logical level, and so, in a sense, there cannot be pluralism all the way down. The adequate alternative logical systems bottom out in a shared basic meta-logic, and as such, logical pluralism is limited. I argue that the content of this basic meta-logic must include the analogue of logical rules Modus Ponens (MP) and Universal Instantiation (UI). I show this through a detailed analysis of the ‘adoption problem’, which manifests something special about MP and UI. It appears that MP and UI underwrite the very nature of a logical rule of inference, due to all rules of inference being conditional and universal in their structure. As such, all logical rules presuppose MP and UI, making MP and UI self-governing, basic, unadoptable, and (most relevantly to logical pluralism) required in the meta-logic for the adequacy of any logical system.
Keywords Adoption Problem  Logical Pluralism  Logical Rules  Inference
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DOI 10.1007/s11229-019-02134-8
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References found in this work BETA

Logical Pluralism.Jc Beall & Greg Restall - 2005 - Oxford University Press.
Blind Reasoning.Paul Boghossian - 2003 - Aristotelian Society Supplementary Volume 77 (1):225–248.
Knowledge of Logic.Paul Boghossian - 2000 - In Paul Boghossian & Christopher Peacocke (eds.), New Essays on the A Priori.
Rule-Following and Meaning.Alexander Miller & Crispin Wright (eds.) - 2002 - Mcgill-Queen's University Press.

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Citations of this work BETA

The Adoption Problem and Anti-Exceptionalism About Logic.Suki Finn - 2019 - Australasian Journal of Logic 16 (7):231.

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