3 ms·
It took a bit of work to understand what was going on here though: "From this proposition it will follow, when arithmetical addition has been defined, that 1 +
by hopw_roewur_ne 9y ago
It took a bit of work to understand what was going on here though: "From this proposition it will follow, when arithmetical addition has been defined, that 1 + 1 = 2."
https://en.wikipedia.org/wiki/Principia_Mathematica#/media/File:Principia_Mathematica_54-43.png https://en.wikipedia.org/wiki/Principia_Mathematica#/media/F...