, Volume 13, Issue 3, pp 265–274

The Relation between Formal and Informal Logic

  • Ralph H. Johnson

DOI: 10.1023/A:1007789101256

Cite this article as:
Johnson, R.H. Argumentation (1999) 13: 265. doi:10.1023/A:1007789101256


The issue of the relationship between formal and informal logic depends strongly on how one understands these two designations. While there is very little disagreement about the nature of formal logic, the same is not true regarding informal logic, which is understood in various (often incompatible) ways by various thinkers. After reviewing some of the more prominent conceptions of informal logic, I will present my own, defend it and then show how informal logic, so understood, is complementary to formal logic.

argumentargumentationformal logicinformal logicimplicationformaltheory of argument

Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • Ralph H. Johnson
    • 1
  1. 1.Department of PhilosophyUniversity of WindsorWindsorCanada