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Comment on “The Calculus of Individuals and its Uses”


Henry S. Leonard Sr.


Pages 127 - 128



Prefatory note. Henry S. Leonard Sr. died suddenly in 1967 of a heart attack. At that time he was working on a collection of his papers (some of which had not been published), with a view to publishing them as a book. He planned to write comments on each paper, but only three or four of the commentaries were completed. His Comments on his paper “The Calculus of Individuals and its Uses” (1940), written jointly with Nelson Goodman, were completed but have never been published before.




1Philosophy Department, Michigan State University



1 Leonard, H.S; Goodman, N., (1940), “The Calculus of Individuals and its Uses,” The Journal of Symbolic Logic 5: 45-55.

2 Goodman, N., (1951), The Structure of Appearance, Cambridge: Harvard University Press; 2nd ed. 1966, Indianapolis, Bobbs-Merrill; 3rd ed. 1977, Dordrecht, Holland, D. Reidel.

3 Whitehead, A. N.; Russell, B., (1925-27), Principia Mathematica, 2nd ed., 3 vols., Cambridge, The University Press.

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