Was trying to remember this idea the other night, all I could remember was that it was from somebody who did triangles and his name started with a “p” and it WASN’T Pythagoras. Anyway it’s been killing me for the past few days and google searches didn’t help. I knew it was someone really famous and it would be obvious if I could just get the name. In the end I found a list of mathematicians beginning with P on Wikipedia. It was Pascal! Yay! Anyway here’s a link to his triangle and his wager (that was the idea whose attribution was annoying me so).