def is_uncertainty_date_inclusive(self):
raise Unimplemented()<EOL>
Tests if the uncertainty is inclusive of all dates.

        An inclusive uncertainty includes the entire range specified by
        the uncertainty units e.g. +/- 1 year includes all of the months
        and days within that interval. A non-inclusive uncertainty would
        mean the year is uncertain but the month and day is certain.

        return: (boolean) - ``true`` if the uncertainty includes all
                dates, ``false`` otherwise
        raise:  IllegalState - ``defines_uncertainty()`` is ``false``
        *compliance: mandatory -- This method must be implemented.*