What's the point in defaulting functions in C++11?

Question

C++11 adds the ability for telling the compiler to create a default implementation of any of the special member functions. While I can see the value of deleting a function,

Answer 1

A defaulted constructor will have a declaration, and that declaration will be subject to the normal access rules. E.g. you can make the default copy constructor protected. Without these new declarations, the default generated members are public.