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 1 + 1 = 2 pythagorean Nerd of Disrepute   Posts: 291 Threads: 11 Likes Received: 33 in 25 posts Likes Given: 68 Joined: Nov 2023 Reputation: -6 11-14-2023, 06:26 AM (This post was last modified: 11-14-2023, 06:35 AM by pythagorean.) 1 + 1 = 2 Why it took 379 pages to prove 1+1=2 Three Dog Night - One (1969) The Logical Song test   • Bucky Ball Old friend, posts occasionally.       Posts: 7,262 Threads: 37 Likes Received: 7,998 in 3,933 posts Likes Given: 3,009 Joined: Sep 2018 Reputation: 34 11-14-2023, 08:22 AM 1 + 1 = 2 2.4 + 2.4 = 4.8, or when rounded, 2 + 2 = 5. Test The following 3 users Like Bucky Ball's post: polymath257 Junior Member  Posts: 216 Threads: 1 Likes Received: 509 in 166 posts Likes Given: 301 Joined: Apr 2022 Reputation: 6 11-15-2023, 01:37 AM 1 + 1 = 2 Axioms: For all x, x+0=x For all x,y, x+s(y)=s(x+y) Definitions: 1=s(0), 2=s(1), 3=s(2), 4=s(3) Then 1+1= 1+s(0) =s(1+0) =s(1) =2 Also, 2+2=2+s(1) =s(2+1) =s(2+s(0)) =s(s(2+0)) =s(s(2)) =s(3) =4 The following 1 user Likes polymath257's post: airportkid ________________________      Posts: 2,665 Threads: 81 Likes Received: 4,448 in 1,923 posts Likes Given: 1,391 Joined: Sep 2018 Reputation: 25 11-15-2023, 03:33 AM 1 + 1 = 2 Start with an identity: A = B Multiply both sides by B A X B   =   B^2 Subtract A^2 from both sides A X B  -  A^2  =   B^2  -  A^2 Factor A X (B  -  A)   =  (B + A)  X  (B  -  A) Simplify A   =   B  +   A Substitute A for B since A = B A   =   A  +  A OR 1  =  2 QED • « Next Oldest | Next Newest »