“Neither Aristotelian nor Russellian rules give the exact logic of any expression of ordinary language; for ordinary language has no exact logic.”
Strawson (1950) On Referring p. 27.
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P. F. Strawson 8
British philosopher 1919–2006Related quotes

Internet Encyclopedia of Philosophy

in La formation scientifique, Une communication du Prix Nobel d’économie, Maurice Allais http://www.canalacademie.com/Maurice-Allais-la-formation.html, address to the Académie des Sciences Morales et Politiques (1997).
Context: Any author who uses mathematics should always express in ordinary language the meaning of the assumptions he admits, as well as the significance of the results obtained. The more abstract his theory, the more imperative this obligation.
In fact, mathematics are and can only be a tool to explore reality. In this exploration, mathematics do not constitute an end in itself, they are and can only be a means.

Source: V. Peckhaus, "19th Century Logic between Philosophy and Mathematics," Bulletin of Symbolic Logic, 5 (1999), 433-450.

“There is a logic of language and a logic of mathematics.”
The Secular Journal of Thomas Merton (1959)
Context: There is a logic of language and a logic of mathematics. The former is supple and lifelike, it follows our experience. The latter is abstract and rigid, more ideal. The latter is perfectly necessary, perfectly reliable: the former is only sometimes reliable and hardly ever systematic. But the logic of mathematics achieves necessity at the expense of living truth, it is less real than the other, although more certain. It achieves certainty by a flight from the concrete into abstraction. Doubtless, to an idealist, this would seem to be a more perfect reality. I am not an idealist. The logic of the poet — that is, the logic of language or the experience itself — develops the way a living organism grows: it spreads out towards what it loves, and is heliotropic, like a plant.

Zadeh (1975) "Fuzzy logic and approximate reasoning". Synthese 30: p. 407
1970s
Source: Meaning And Necessity (1947), p. 7-8 as cited in: Erich Reck (2011) " Carnapian Explication: A Case Study and Critique http://www.faculty.ucr.edu/~reck/Reck-C'ian%20Explic.%20(3rd.%20rev.).pdf"

“But ordinary language is all right.”
Source: 1930s-1951, The Blue Book (c. 1931–1935; published 1965), p. 28

“Neither in the arts, nor in logic, nor in life should an idea by in any way treated as a thing.”