 Thus Gelug asserts that neither of the two truths is more or less significant than the other. Indeed, while the illusion only makes sense as illusion in relation to that which is not illusion, the reflection only makes sense as reflection in relation to that which is reflected. So, too, does the real only make sense as real in relation to the illusion, the thing reflected in relation to its reflection. This also holds in the case of discussions about the ultimate nature of things, such as the being of the sprout—it only makes sense inasmuch as it holds in discussions of ordinary phenomena. The only criterion that determines a thing’s truth in the Prāsaṅgika Madhyamaka system, according to Gelug, is the causal effectiveness of the thing as opposed to mere heuristic significance. The sprout’s empty mode of being and its being as appearance are both truths, insofar as both are causally effective, and thus both functional.