While looking at [CWG3103](https://cplusplus.github.io/CWG/issues/3103.html), I got interested how we arrived at status quo, specifically how [[basic.scope.scope]/3.1](https://wg21.link/basic.scope.scope#3.1) came to be, and this is what I found. One of the conclusions I arrived at is that it doesn’t make much sense to overload member functions with explicit object parameter of non-reference type with member functions of any other kind of object parameter with the same type, ignoring references.