`respond_to?` vs. `respond_to_missing?`

Question

What is the point of defining respond_to_missing? as opposed to defining respond_to?? What goes wrong if you redefine respond_to? for some

Answer 1

It's a good practice to create respond_to_missing? if you are overriding method_missing. That way, the class will tell you the method you are calling exists, even though it's not explicitly declared.

respond_to? should probably not be overriden :)