 Since mere mind is the basis of the division of the two truths wherein ultimate truth—wisdom—alone is seen as satisfying the criterion of truth, so conventional truth—ignorance—cannot properly be taken as truth. Wisdom and ignorance are invariably contradictory, and thus the two truths cannot coexist. Sakya argues, in fact, that conventional truth must be negated in the ascent to ultimate truth. Given wisdom’s primacy over ignorance, in the final analysis it is ultimate truth alone that must prevail without its merely conventional counterpart. Conventional truth is an expedient means to achieve ultimate truth, and the Buddha described conventional truth as truth to suit the mentality of ordinary beings (Gorampa 1969a: 370b). The two truths are thus categorized as a means (thabs) and a result (thabs byung). Conventional truth is the means to attain the one and only ultimate truth.