On a Definition of Logical Consequence

Kürbis, Nils

doi:10.5840/tht20233612

Thought: A Journal of Philosophy

ONLINE FIRST

published on March 8, 2023

Nils Kürbis

https://doi.org/10.5840/tht20233612

On a Definition of Logical Consequence

Bilateralists, who accept that there are two primitive speech acts, assertion and denial, can offer an attractive definition of consequence: Y follows from X if and only if it is incoherent to assert all formulas X and to deny all formulas Y. The present paper argues that this definition has consequences many will find problematic, amongst them that truth coincides with assertibility. Philosophers who reject these consequences should therefore reject this definition of consequence.

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