"There are lots of good anecdotes about the bomb and Father ... For instance, do you know the story about Father on the day they first tested a bomb out at Alamagordo? After the things went off, after it was a sure thing that America could wipe out a city with just one bomb, a scientist turned to Father and said, 'Science has now known sin.' And do you know what Father said? He said, 'What is sin?'"
January 1, 1970
https://en.wikiquote.org/wiki/Cat's_Cradle