Even though, it would be the same as issubclass()
(though I'd like an AND relationship with the tuple of
ABCs..)
When "hasinterface" ANDs the tuple, it's already different, isn't
it?
If it's AND, shouldn't it be "hasinterfaces" (notice the s!)?
One could also imagine that isinstance and issubclass taking a keyword argument for the logical operator. Maybe just something as simple as "isinstance(foo, (a, b), all=True)"