Right but that definition has drifted. That's not necessarily a problem in and of itself but in the process of drifting in this case it has obscured the original definition, which now is orphaned without a label. The problem therein is that it's left the discourse; since the subject of the old definition is more likely to precede and be a cause of the subject of the new definition, it seriously muddies the discourse and arguably the modes of thinking about the solution.