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A note on harmony

Research output: Research - peer-reviewArticle

Abstract

In the proof-theoretic semantics approach to meaning, harmony, requiring a balance between introduction-rules (I-rules) and elimination rules (E-rules) within a meaning conferring natural-deduction proof-system, is a central notion. In this paper, we consider two notions of harmony that were proposed in the literature: 1. GE-harmony, requiring a certain form of the E-rules, given the form of the I-rules. 2. Local intrinsic harmony: imposes the existence of certain transformations of derivations, known as reduction and expansion. We propose a construction of the E-rules (in GE-form) from given I-rules, and prove that the constructed rules satisfy also local intrinsic harmony. The construction is based on a classification of I-rules, and constitute an implementation to Gentzen’s (and Prawitz’) remark, that E-rules can be “read off” I-rules.
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Original languageEnglish
Pages (from-to)613–628
Number of pages16
JournalJournal of Philosophical Logic
Volume41
Issue number3
StatePublished - Jun 2012

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