I don't disagree with anything in this post. But I would comment that again, the only reason 'disabled' now has this more narrowed concept attached to it is recent usage. In the general sense of English semantics, if you are unable to do something, you are disabled wrt it, so an injured player is disabled. At 50,000 ft with no other social context, that is perfectly good usage. Again, it doesn't bother me to use IL instead of DL at all. I'm just amused by the way the wheel turns.