“Convictions are variable; to be always consistent is to be sometimes dishonest.”
Source: Epigrams, p. 367
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Ambrose Bierce 204
American editorialist, journalist, short story writer, fabu… 1842–1914Related quotes

Source: Academy Series - Priscilla "Hutch" Hutchins, Odyssey (2006), Chapter 12 (p. 106)

Source: Philosophy of Education, p. 88.

Variant: A linguistic variable is defined as a variable whose values are sentences in a natural or artificial language.
Source: 1970s, Outline of a new approach to the analysis of complex systems and decision processes (1973), p. 28

Vol. II, Ch. XX, p. 452.
(Buch II) (1893)

Proposition VI, On Formally Undecidable Propositions in Principia Mathematica and Related Systems I (1931); Informally, recursive systems of axioms cannot be complete.

Tobin, James. " Estimation of relationships for limited dependent variables http://cowles.econ.yale.edu/P/cp/p01a/p0117.pdf." Econometrica: journal of the Econometric Society (1958): 24-36.
1950s-60s