Because, read Feynman's paper. No really, read it. His writing style is very accessible. Ignore the formulas; read the words. http://www.phy.mtu.edu/~sgowth

Because, read Feynman's paper. No really, read it. His writing style is very accessible. Ignore the formulas; read the words. http://www.phy.mtu.edu/~sgowtham/PH4390/Week_02/IJTP_v21_p467_y1982.pdf http://www.phy.mtu.edu/~sgowtham/PH4390/Week_02/IJTP_v21_p46...