Consider also the parallel ‘postulate’, reluctantly introduced as an axiom in Euclid. People tried to prove it as a theorem for two thousand years, until it was realized that its negation defined entirely different kinds of geometry.
Consider also the parallel ‘postulate’, reluctantly introduced as an axiom in Euclid. People tried to prove it as a theorem for two thousand years, until it was realized that its negation defined entirely different kinds of geometry.