Chapter 16. Modality of Deductively Valid Inference

  1. Dale Jacquette
  1. Dale Jacquette

Published Online: 26 NOV 2007

DOI: 10.1002/9780470996751.ch17

A Companion to Philosophical Logic

A Companion to Philosophical Logic

How to Cite

Jacquette, D. (2006) Modality of Deductively Valid Inference, in A Companion to Philosophical Logic (ed D. Jacquette), Blackwell Publishing Ltd, Oxford, UK. doi: 10.1002/9780470996751.ch17

Publication History

  1. Published Online: 26 NOV 2007
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780631216711

Online ISBN: 9780470996751

SEARCH

Keywords:

  • deductively valid inference;
  • validity paradox;
  • impredicative formulation;
  • deductive inference;
  • nonstandard model

Summary

This chapter contains sections titled:

  • Validity and Necessity

  • The Validity Paradox

  • Gödel Arithmetizing the Validity Paradox

  • The Validity Paradox in S5

  • Validity, Necessity, and Deductive Inference