Simple question: if a leg hurts me, do I still say "la kruro doloras min", although I have two of them?
Why I'm wondering is because I feel a contradiction with the definite meaning of the article la for single objects. In other situations I'm aware of, it's linked to the fact that the object is uniquely identifiable: something that has been mentioned earlier in the conversation, something that's unique on its own etc. But here the listener wouldn't know if it's my left leg or the right one! Is it a separate use case that doesn't share the connotation? Or is there something better I should be saying instead?