I think you are thinking about this talk by Richard Hamming [1] at Bell. Search for “door closed” for the part you’re referring to. [1] https://www.cs.virginia

I think you are thinking about this talk by Richard Hamming [1] at Bell. Search for “door closed” for the part you’re referring to. [1] https://www.cs.virginia.edu/~robins/YouAndYourResearch.html https://www.cs.virginia.edu/~robins/YouAndYourResearch.html