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Ignorance$
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Peter Unger

Print publication date: 1978

Print ISBN-13: 9780198244172

Published to Oxford Scholarship Online: November 2003

DOI: 10.1093/0198244177.001.0001

An Argument for Universal Ignorance

Chapter:
(p. 92 ) III An Argument for Universal Ignorance
Source:
Ignorance
Author(s):

Peter Unger (Contributor Webpage)

Publisher:
Oxford University Press
DOI:10.1093/0198244177.003.0004

An argument for universal ignorance is defended, ruling out even the Cartesian knowledge that “I exist now.” This argument involves normative premises: if someone knows something to be so, then it is at least all right for the person to be absolutely certain that it is so. But, on pain of dogmatism, it is never even all right for anyone to be absolutely certain that anything is so. Therefore, nobody ever knows that anything is so. This result is supported by the analysis of “S knows that p” as “it is clear to S that p”.

Keywords:   analysis, certainty, clarity, dogmatism, knowledge, normativity, universal ignorance

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