Why does 2 + 2 = 4?
"That question is extraordinarily difficult. I recommend Bertrand Russell's treatment of this:Introduction to Mathematical Philosophy." Michael Connell, Ed.D., The Education Scientist
"2 + 2 = ? appears to be one of the easiest problems in mathematics, and it is probably one of the first you ever encountered. If Kate has 2 apples and Matt gives her 2 more apples, then she has 4 apples. Obviously.
But what if we told you that 2 + 2 = ? has stumped even some of the smartest mathematicians because it doesn’t necessarily have to equal 4?"......
http://www.businessinsider.com/2--2-doesnt-always-equal-4-2014-6?IR=T
