Subject-object and in general the sorts of polarities that could go into a hypothetical topology of consciousness have the property of being reversible, or in other words being essentially formal. There is no problem in topology in going through a strange twist and coming out on the reverse side - it is essentially 'deconstructible'. Polaritiesuch as female-male or ground-existence do not work that way. In these cases what might happen is that one pole - female, ground or yin - might appear to swallow up the other one, but this is only an appearance in which the original difference nevertheless lies concealed.