113:, Langford is known for the Langford substitution test. The test distinguishes used from merely mentioned expressions in a given sentence by translating the sentence into a different language (see Langford 1937). If the very same expression reoccurs in the translation, it was mentioned rather than used in the original sentence. If the expression does not reoccur and is replaced by some other (usually synonymous) expression, then it was used in the original sentence. This test is used by a famous argument from
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in 1920. His college education was interrupted by World War I in 1917 when he joined the U.S. army and spent 20 months overseas. After receiving his A.B. degree, Langford enrolled in 1920 as a graduate student at
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during 1924–1925. Upon his return to the U.S., Langford became an instructor at
Harvard from 1925 to 1927. After spending two academic years, 1927–1929, as an assistant professor at the
87:. Langford became a full professor at the University of Michigan in 1933, remaining there for the rest of his career. In the academic year 1935–1936, he was a
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in 1924. With the aid of a
Sheldon Traveling Fellowship, he studied logic and philosophy at
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Langford, C. H. (1937). "Review of: The
Significs of Pasigraphic Systems by E. W. Beth".
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Langford, C. H. (1949-01-06). "A Proof That
Synthetic A Priori Propositions Exist".
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Church, A. (1950). "On Carnap's
Analysis of Statements of Assertion and Belief".
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William, William; Burks, Arthur W. (1964). "Cooper Harold
Langford 1895-1964".
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Proceedings and
Addresses of the American Philosophical Association
447:"Cooper Harold Langford – John Simon Guggeheim Memorial Foundation"
422:"Cooper Harold Langford | Faculty History Project – U. of Michigan"
91:, dividing his time between Vienna and Cambridge, England.
94:Langford is famous as co-author of the 1932 book
71:, where he earned his Ph.D. in psychology under
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176:"An analysis of some general propositions"
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140:"On quantifiers for general propositions"
54:After spending his freshman year at the
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42:. He is also known for introducing the
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550:Works by C. H. Langford – PhilPapers
124:Langford was married twice. His son
570:20th-century American philosophers
58:, Langford transferred in 1915 to
26:– 28 August 1964) was an American
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264:10.1090/s0002-9947-1927-1501378-8
102:. His doctoral students include
16:American philosopher (1895–1964)
299:10.1090/s0002-9904-1928-04625-6
282:"Concerning logical principles"
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595:University of Michigan faculty
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580:American philosophy academics
516:The Journal of Symbolic Logic
348:The Journal of Symbolic Logic
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590:Harvard University alumni
471:Lewis & Langford 1959
379:The Journal of Philosophy
34:who co-authored the book
22:(25 August 1895, Dublin,
280:Langford, C. H. (1928).
244:Langford, C. H. (1927).
211:"On inductive relations"
209:Langford, C. H. (1927).
174:Langford, C. H. (1927).
138:Langford, C. H. (1926).
100:system of modal logic S5
81:University of Washington
62:, where he received his
565:Clark University alumni
320:Langford, Cooper Harold
251:Trans. Amer. Math. Soc.
145:Bull. Amer. Math. Soc.
111:philosophy of language
85:University of Michigan
56:University of Arkansas
44:Langford–Moore paradox
24:Logan County, Arkansas
20:Cooper Harold Langford
585:Analytic philosophers
286:Bull. Amer. Math. Soc
215:Bull. Amer. Math. Soc
180:Bull. Amer. Math. Soc
32:mathematical logician
77:Cambridge University
28:analytic philosopher
575:American logicians
328:Dover Publications
126:Cooper H. Langford
69:Harvard University
89:Guggenheim fellow
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559:Categories
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491:: 99–101.
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322:(1959) .
50:Biography
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