The trouble Anderson and Belnap have with relevance

✍ Scribed by B. J. Copeland

• Book ID: 104737207
• Publisher: Springer Netherlands
• Year: 1980
• Tongue: English
• Weight: 509 KB
• Volume: 37
• Category: Article
• ISSN: 0031-8116
• DOI: 10.1007/bf00354901

✦ Synopsis

C.I. Lewis set out to produce a systematic formal analysis of the relation converse to the relation of deducibility, or in other words, of the relation of entailment. The result was his modal logic, and he claimed of his modal operator strict implication that it "expresses precisely that relation which holds when valid deduction is possible, and fails to hold when valid deduction is not possible" (1932, p. 247).