However, Vasubandhu's most compelling proof for idealism appeals to the method of mereological reduction: wholes, being merely collections of minimal parts, do not actually exist as perceived. But wholes, which are extended objects, must necessarily be made of parts, the ultimate building blocks of which are the atoms. And since atoms, conceived as partless point-instant are ultimately insubstantial, the realist argument for the existence of material objects as conglomerates of parts must b