Complex sentence: If we reciprocate such a canonical polyhedron about its intersphere, the dual polyhedron will share the same edge-tangency points and so must also be canonical; it is the canonical dual, and the two together form a canonical dual pair.
Split into simpler sentences: If we reciprocate such a canonical polyhedron about its midsphere, the dual polyhedron will share the same edge-tangency points and so must also be canonical. It is the canonical dual, and the two together form a canonical dual pair.