The Opposition (n.) does not erase itself; each of its terms must appear as the différance of the other.
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An Opposition (n.) whose middle is no passage between its terms is probably not pertinent at all.
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An Opposition (n.) between metaphysical concepts is never two equal terms facing each other; it is a hierarchy, an order of subordination.
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The Opposition (n.) needs each term to lie outside the other, so one opposition must already be the matrix of all opposition.
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The Opposition (n.) is never simply erased: it is reactivated and thrown back into play, but as an effect rather than a rule of the game.