Ruby objects without 'to_s' [closed]

Question

Are there any objects in ruby that don't respond to to_s?

The question isn't meant to ask whether it is possible to create one, which I know can be done by undef_method. Feel free to explain details, including caveats of undefining.

Answer 1

The BasicObject class does not define a to_s method, so any instance of that class would not have a to_s method.