What is it that we're defining in this class?

A stateA behaviorAn instance variableThis isn't a valid class

Hooray! We're defining the dig method, which is a behavior. This is a valid class but it's true that we don't usually make classes without states.

So close! We're defining the dig method, which is a behavior. This is a valid class but it's true that we don't usually make classes without states.