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anonymous
 4 years ago
Is there a proof for why:
1 + 1 = 2
I've heard of the Principua Mathematica, and that it came close but never fully did it.
anonymous
 4 years ago
Is there a proof for why: 1 + 1 = 2 I've heard of the Principua Mathematica, and that it came close but never fully did it.

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JamesJ
 4 years ago
Best ResponseYou've already chosen the best response.1On the contrary, they do prove it.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0whats the sense of 2 if its not 1+1

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I heard that they came close but never defined addition; after them godel came along and made things even more complicated.

JamesJ
 4 years ago
Best ResponseYou've already chosen the best response.1You have to put that book in its historical context and the "project" that Russell and Whitehead were undertaking. Given their very careful definition of number, and definition of 1, and definition of 2, and definition of +, and definition of =, then do indeed show that 1 + 1 = 2. What they didn't do, and what Gödel's results cemented, is finish building up mathematics from elementary logical definitions.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Thank you, that cleared it up

JamesJ
 4 years ago
Best ResponseYou've already chosen the best response.1Among other things, I've read a graphic novel about this ... let me find it ...

JamesJ
 4 years ago
Best ResponseYou've already chosen the best response.1If you want a relatively digestible accounting of the story, this isn't a bad resource.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thanks, it'll be useful. Until i'm one day ready to even attempt reading principua mathematica.

JamesJ
 4 years ago
Best ResponseYou've already chosen the best response.1It's a bit of a historical curiosity now. If you're interested in Russell's definition of number, a much shorter and in many ways more useful book is this: http://www.amazon.com/IntroductionMathematicalPhilosophyBertrandRussell/dp/0486277240/ref=sr_1_5?s=books&ie=UTF8&qid=1324525990&sr=15
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