Quote Originally Posted by laserlight View Post
This observation does not show that "friends actually support comparable or greater degrees of encapsulation than do member functions". Rather, it is a practical point concerning the tendency of those who design classes with respect to these features.
Sure, although that tendency of those who design classes does have an effect on various measures - such as those related to sensitivity to change.

Also, bear in mind that the probability of (A or B) is never less than the probability of A.