Ruth Barcan Marcus

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What Wikipedia says

Ruth Barcan Marcus (; born Ruth Charlotte Barcan; 2 August 1921 – 19 February 2012) was an American academic philosopher and logician best known for her work in modal and philosophical logic.

Excerpt from the Wikipedia article “Ruth Barcan Marcus”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Michael Marsland / Yale University, CC BY 3.0, via Wikimedia Commons.