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Ernest Nagel and James R. Newman Gödel's proof. New York: New York University Press, 1958. ix + 118 pp. $1.75 (paper) and $2.95.

Published online by Cambridge University Press:  14 March 2022

Hilary Putnam
Hilary Putnam*
Affiliation:
Princeton University
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Type
Book Reviews
Information
Philosophy of Science , Volume 27 , Issue 2 , April 1960 , pp. 205 - 207
Copyright
Copyright © 1959 by Philosophy of Science Association

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References

1 If we assume the consistency of elementary number theory, then we can show that the predicate P used in Rosser's undecidable sentence ~P(a) is equivalent to Gödel's predicate “Bew.” But the sentences ~Bew (b) and ~P(a) are not thereby equivalent, since the number-designating expressions a and b involved are names for different integers.