the equals of something can be used to identify that something
equation is equalization. humanly_overleapable_object is not tangible_thing. marking_for_identification is not marking. color is attribute_of_objects. chromosome_1 is tangible_thing. marking_for_identification is marking. identifier is symbol. humanly_overleapable_object is tangible_thing. marking is tangible_thing. equal is artificial_substance.