> Our thinking about cars is highly abstract, as though it's an abstract class/interface with a single go_somewhere(destination) method, which fits quite well

> Our thinking about cars is highly abstract, as though it's an abstract class/interface with a single go_somewhere(destination) method, which fits quite well with OOP thinking. So what you're saying is I'm going to have to downcast to a concrete class to figure out if my object is actually suitable for going to the store or my bathroom (my house isn't big enough to drive a car through). Lines up with most OOP systems I've worked in.