When you go back to the A/B/C issue, I remain unimpressed: the A isn't Joint. It can't land on a carrier.
True enough. But on the other hand no other aircraft, even aircraft that started out as USN aircraft like the A-1, F-4, and A-7 were "joint" by this definition. The USAF version of those USN aircraft could not land on a carrier either. Although technically, the B would be joint by this definition as it can land on a carrier. So while I agree with your point, I'm having trouble seeing its utility. Help me out here shipmate.