@abc.abstractmethod<EOL><INDENT>def is_uncertainty_time_inclusive(self):<DEDENT>
return<EOL>
Tests if the uncertainty is time inclusive.

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

        :return: ``true`` if the uncertainty includes all times, ``false`` otherwise
        :rtype: ``boolean``
        :raise: ``IllegalState`` -- ``defines_uncertainty()`` is ``false``

        *compliance: mandatory -- This method must be implemented.*