###

    # 1999/3/5

    #===========================#
    # English -> KR translation #
    #===========================#

    # Men are from Mars; women are from Venus.

    at time=past
    man do move from space=Mars to space=Earth
    woman do move from space=Venus to space=Earth

    #===================#
    # concept-formation #
    #===================#

    # The most fundamental form of concept-formation
    # is the integration of two or more old concepts into a new concept.
    # Focusing on the similarities, and disregarding the differences,
    # each old concept is regarded as a "unit" of the new concept.

    at time=now
    man has origin=Mars; woman has origin=Venus

    person isi man,woman with origin  # integrate with respect to origin
    person has origin                 # either Mars or Venus

    #=============#
    # definitions #
    #=============#

    # There are three methods of defining a concept.

    #   integration (ostensive)
    	person is either man or woman

    #   differentiation (genus-differentia)
    	person is animal with identify  # identify isa action

    #   identity (alias)
    	person is human being