According to Mark Siderits, after disposing of these objections, Vasubandhu believes he has shown that "vijñapti-mātra" is just as good at explaining and predicting the relevant phenomena of experience as any theory of realism that posits external objects. Therefore, he then applies the Indian philosophical principle termed the "Principle of Lightness" (which is similar to Occam's Razor) to rule out realism since "vijñapti-mātra" is the simpler and "lighter" theory, "that is, the theory that posits the least number of unobservable entities."