> employees do not calculate their own pay My paychecks list the hours and rate paid, more often than not. But dispensing with that (because it's not relevant)

> employees do not calculate their own pay My paychecks list the hours and rate paid, more often than not. But dispensing with that (because it's not relevant), a class isn't an actor-model. The tried-and-true Class Car->Drive() example (the car is doing something) is a contrived way to illustrate one of the ways a class can be used, as a learning tool. You don't want to create systems with that mentality, as it will always disappoint and spawn countless new webs of inheritance as time goes on. This is all hand waving, but that's a rather important issue to realize. There's no science behind design yet and it hasn't changed since the late 90s (when I started). My experience teaches me as with your own. I am afraid we'll just have to agree to disagree.