Ken Akiba
Virginia Commonwealth University
It is usually held that what distinguishes a good inference from a bad one is that a good inference is truth-preserving. Against this view, this paper argues that a logical inference is good or bad depending not on whether it is truth-preserving or not, but whether it belongs to a logical system the addition of which makes a deductively conservative extension of the derivation relations among the atomic statements. To so argue, the paper first contends that the meaning of the logical operators of classical logic is determined not by their connections to truth, but by their inferential roles. It is claimed in conclusion that there is no genuine issue over which logic, classical or intuitionistic, is the correct logic, for they are both conservative in the relevant sense
Keywords Contemporary Philosophy  General Interest
Categories (categorize this paper)
ISBN(s) 1053-8364
DOI 10.5840/jpr_2000_17
Edit this record
Mark as duplicate
Export citation
Find it on Scholar
Request removal from index
Revision history

Download options

PhilArchive copy

Upload a copy of this paper     Check publisher's policy     Papers currently archived: 58,425
External links

Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
Through your library

References found in this work BETA

No references found.

Add more references

Citations of this work BETA

The Reliability Challenge and the Epistemology of Logic.Joshua Schechter - 2010 - Philosophical Perspectives 24 (1):437-464.

Add more citations

Similar books and articles

Logic as Instrument: The Millian View on the Role of Logic.Ken Akiba - 1996 - History and Philosophy of Logic 17 (1-2):73-83.
Propositional Logic.Kevin C. Klement - 2004 - Internet Encyclopedia of Philosophy.
A Note on Formality and Logical Consequence.Mario Gómez-Torrente - 2000 - Journal of Philosophical Logic 29 (5):529-539.
Fuzzy Logic and Approximate Reasoning.L. A. Zadeh - 1975 - Synthese 30 (3-4):407-428.
What is an Inference Rule?Ronald Fagin, Joseph Y. Halpern & Moshe Y. Vardi - 1992 - Journal of Symbolic Logic 57 (3):1018-1045.
The Logic of Pragmatic Truth.Newton C. A. Da Costa, Otávio Bueno & Steven French - 1998 - Journal of Philosophical Logic 27 (6):603-620.
The Psychology-Logic Overlap.G. B. Keene - 1995 - Behavior and Philosophy 23 (2):57 - 62.
Probability Logic in the Twentieth Century.Theodore Hailperin - 1991 - History and Philosophy of Logic 12 (1):71-110.


Added to PP index

Total views
113 ( #89,007 of 2,420,821 )

Recent downloads (6 months)
3 ( #249,143 of 2,420,821 )

How can I increase my downloads?


My notes