> Binding data and functions together beats operating on global data visible to everything. One of the big wins of OOP is less exposed global data. “Passing st

> Binding data and functions together beats operating on global data visible to everything. One of the big wins of OOP is less exposed global data. “Passing state as parameters” is what solved the “everything operating on global state” problem. Binding functions and state permitted polymorphism/abstraction. > Multiple inheritance is seldom worth the headaches. Single inheritance is never worth the headaches. :) > Objects are probably more useful than some of the things invented to replace objects, like "traits". Traits don’t replace objects; they are interfaces with static dispatch semantics.