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Metametaphysics is even more fascinating than metaphysics:
http://consc.net/metametaphysics/
My favorite metametaphysical question: is it reasonable to discuss about the whole world with some elements of it? Metaphysicians are these elements.
The interesting issue arises: could metametaphysics be pursued apart from metaphysical views of the people dealing with it? This question belongs to metametametaphysics.
Marcin Dolecki 