http://stackoverflow.com/questions/3192978/why-does-ruby-have-trueclass-and-falseclass-instead-of-a-single-boolean-class http://stackoverflow.com/questions/3192

http://stackoverflow.com/questions/3192978/why-does-ruby-have-trueclass-and-falseclass-instead-of-a-single-boolean-class http://stackoverflow.com/questions/3192978/why-does-ruby-hav...