From: Hans Mackowiak Date: 2013-03-18T17:02:09+09:00 Subject: Re: confusion with singleton method call true.singleton_class #=> TrueClass false.singleton_class #=> FalseClass nil.singleton_class #=> NilClass thats why each try to define singleton classes on this objects are turned into normal method defining on the real classes -- Posted via http://www.ruby-forum.com/.