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How do you prove that 2+2=4? Is it enough to consider 2 objects, then 2 more then put them together and count them and get 4, or do you have to resort to fancyschmancy methods?
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Last Post:
Nov 18, 2012 7:45 PM




Re: How do you prove that 2+2=4? Is it enough to consider 2 objects, then 2 more then put them together and count them and get 4, or do you have to resort to fancyschmancy methods?
Posted:
Nov 16, 2012 12:06 AM


On Nov 15, 11:22 pm, donstockba...@hotmail.com wrote: > Just askin.
Principia Mathematica BS says it takes 100 pages. I don't know anybody who has tried to explain what is going on there (everyone just sits in awe at the number of pages), but Peano Arithmetic proves it in a few steps where 2 is 0'' and 4 is 0'''', based on the axioms x+0=x and x+y' = (x+y)' where x' is x+1 ("successor of x").
CB



