首楞嚴義疏注經 3.221

3.221

俱聞二體破也。鼻若生香，必不聞臭；必若生臭，應不聞香。今既俱聞，鼻須有二；二鼻若立，兩體還成，正為何體？

This is a refutation on the ground that smelling both implies two bodies. If the nose produces fragrance, it certainly does not smell foulness; if it produces foulness, it should not smell fragrance. Now, since both are smelled, there would have to be two noses; if two noses were established, two bodies would also be formed: which one would be the true body?