FYI, this might shed light on some problems introduced by Russel and Whitehead i...

		bitL on Sept 6, 2016 \| parent \| context \| favorite \| on: How to Learn Advanced Mathematics Without Heading ... FYI, this might shed light on some problems introduced by Russel and Whitehead in Principia Mathematica: http://www.academia.edu/13159243/2015_Pragmatism_the_A_Prior... See also Hempel's raven paradox.