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How To Design Data (HtDD (Type Comment (defines a new type name; shows how…

- - - - shows all the possible values that this new data type can take on
- - - - 1) if a given subclass is the last subclass of its type, we can reduce the test to just the guard (number? c)
      - 2) if all the remaining subclass are off of the same type, then you can remove all guards