Nope, exceptions get their own subclass. Babies would be baby-humans, the mentally ill would be - well you get the idea. These classes are actually a predictable reality given an accurate definition of "human being", a component of the whole. Imagine a dependency graph, with the edge cases as leaf nodes. So the definition of human isn't related to a single entity, or the averaging of the qualities of the entire population - it is related to the attributes that give rise to the entire structure - seed values. Again, this has nothing to do with time, so "give rise to" is more like a logical conclusion than a sequence of events.
You should be aware that there's a significant risk you'll have to turn every single human who ever lived into its own class, and even then you'll run into the Halting problem while trying to identify each case of each classification.
You won't end up with any single seed values you can match any given instance against, but with multidimensional matrices that represents multidimensional scales.
