Chapter

Imperatives and Logic

R. M. Hare

in The Language of Morals

Published in print March 1963 | ISBN: 9780198810773
Published online November 2003 | e-ISBN: 9780191597619 | DOI: http://dx.doi.org/10.1093/0198810776.003.0002
 Imperatives and Logic

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Provisionally characterizes the difference between indicatives and imperatives in terms of assent: while assenting to a statement involves believing something, assenting to a command involves doing something. Considering the logic of indicatives and imperatives, Hare distinguishes between the part of the sentence common to both (the ‘phrastic’) and that which is different (the ‘neustic’), but argues that the entailment relations of ordinary logic are relations between the phrastic of sentences for both moods. Moreover, Hare claims that no imperative conclusion can validly be drawn from premises that do not contain at least one imperative.

Keywords: imperatives; indicatives; inference; logic; neustic; phrastic

Chapter.  5332 words. 

Subjects: Moral Philosophy

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