“During a lecture the Oxford linguistic philosopher J. L. Austin made the claim that although a double negative in English implies a positive meaning, there is no language in which a double positive implies a negative. To which Morgenbesser responded in a dismissive tone, "Yeah, yeah."”
The Independent, The Independent, Professor Sidney Morgenbesser: Philosopher celebrated for his withering New York Jewish humour http://www.independent.co.uk/news/obituaries/professor-sidney-morgenbesser-550224.html, 6 August 2004. The Times, Sidney Morgenbesser: Erudite and influential American linguistic philosopher with the analytical acuity of Spinoza and the blunt wit of Groucho Marx https://www.thetimes.co.uk/article/sidney-morgenbesser-5cz8gg8qfvm, September 8, 2004. (Some have quoted it as "Yeah, right.") Block, Melissa (August 2, 2004). " The Witty Professor: Sidney Morgenbesser https://www.npr.org/templates/story/story.php?storyId=3810783". NPR.org. Baum, Devorah (2017). The Jewish Joke: An essay with examples (less essay, more examples) https://books.google.com/books/about/The_Jewish_Joke.html?id=vwD0DQAAQBAJ. Profile Books. ISBN <bdi>9781782831938</bdi>.
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Sidney Morgenbesser 16
American philosopher 1921–2004Related quotes

Source: Story: Substance, Structure, Style, and the Principles of Screenwriting

“Negating negatives with positives is a form of toxic positivity.”

“It’s a minority position, yeah”
21 March 2017 https://www.politico.com/story/2017/03/rand-paul-senate-backlash-obamacare-russia-236272 when blocking John McCain from bringing up a treaty to ratify Montenegro's membership in NATO
2017

Source: The Subtle Art of Not Giving a F*ck (2016), Chapter 1, “Don’t Try” (p. 9)

Source: A General View of Positivism (1848, 1856), p. 153

“Accentuaute the positives - medicate the negatives.”
Source: I Like You: Hospitality Under the Influence
“Negative get conversed in positive”
The lecture in Ashland, Oregon (8th of July 2005)