“The new "ambiguity" means, in a way adjudged favorable to literary, poetic, intellectually and psychologically well-devised and praiseworthily executed linguistic performance, uncertainty of meaning, or difficulty for the interpreter in identifying just what the meaning in question is: it means the old meanings of ambiguity with a difference. It means uncertainty of meaning (of a word or combination of words) purposefully incorporated in a literary composition for the attainment of the utmost possible variety of meaning-play compressible within the verbal limits of the composition.”

Letter to Robert Bridges (24 October 1883)
Letters, etc
Context: You do not mean by mystery what a Catholic does. You mean an interesting uncertainty: the uncertainty ceasing, interest ceases also... But a Catholic by mystery means an incomprehensible certainty: without certainty, without formulation there is no interest;... the clearer the formulation the greater the interest.

§ 120
Philosophical Investigations (1953)

and perhaps dimly recognizing it to be nonsense, we are nevertheless not inclined to give it up.

p. 58
Philosophical Papers (1979)

Source: Charles Dickens (1906), Ch 1 : "The Dickens Period"

We address this problem by publishing a more precise definition of free software, but this is not a perfect solution; it cannot completely eliminate the problem. An unambiguously correct term would be better, if it didn't have other problems.
1990s, Why "Free Software" is better than "Open Source" (1998)

Source: Everything Is Illuminated (2002)

Source: Culture and Value (1980), p. 50e

Source: Through the Looking-Glass, and What Alice Found There

Source: Anti-Intellectualism in American Life (1974), p. 30