Journal of Philosophical Logic

, Volume 42, Issue 5, pp 767-782

First online:

R and Relevance Principle Revisited

  • Eunsuk YangAffiliated withDepartment of Philosophy, Chonbuk National University Email author 

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This paper first shows that some versions of the logic R of Relevance do not satisfy the relevance principle introduced by Anderson and Belnap, the principle of which is generally accepted as the principle for relevance. After considering several possible (but defective) improvements of the relevance principle, this paper presents a new relevance principle for (three versions of) R, and explains why this principle is better than the original and others.


R RM Relevance logic (Semi-)relevance principle