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## Michael Potter

Print publication date: 2008

Print ISBN-13: 9780199215836

Published to Oxford Scholarship Online: January 2009

DOI: 10.1093/acprof:oso/9780199215836.001.0001

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# Truth-operations

Chapter:
(p.165) Chapter 18 Truth-operations
Source:
Wittgenstein's Notes on Logic
Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199215836.003.0018

From a single proposition p we form its negation not-p. From two propositions p and q we form various further propositions, e.g., p or q, p and q, etc.; similarly (though less often) with three or more propositions. For each such method of forming propositions it is common to speak of a certain truth-function as corresponding to it. On the one hand, there is a function which takes senses of propositions as inputs and returns the sense of a proposition as output. On the other hand, there is a truth-function, i.e., a function taking some finite number of truth-values as arguments and giving a single truth-value as value, which is representable by a truth-table or truth-diagram. This chapter discusses the relationship between the two.

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