he Unthinkable. Robinson Publishing, 2003. Cohen, Paul J. Set Theory and the Continuum Hypothesis. Dover Publications Inc., 2009. Pica, Pierre, and Alain Lecomte. “Theoretical Implications of the Study of Numbers and Numerals in Mundurucu.” Philosophical Psychology 21, no. 4 (August 1, 2008): 507-22. doi:10.10