 Vasubandhu offers his Yogācāra reply in the Viṃ to these realist objections and insists that the idealist position does not face these three problems. The first problem is not an issue for the Yogācāra since dreams (svapna) account for the spatio-temporal determination. In dreams, in the absence of an external object, one still has the cognition of a woman, or a man in only determinate / specific time and place, and not arbitrarily and not everywhere and not in any moment. Neither is the second problem of the lack of an intersubjective agreement an issue for the Yogācāra. The case of the pretas (hungry-ghosts) account for intersubjective agreement as they look at water they alone, not other beings, see rivers of pus, urine, excrement, and collectively hallucinates demons as the hell guardians. Although pus, urine, excrement and hell guardians are nonexistent externally, due to the maturation of their collective karma, pretas exclusively experience the series of cognitions (vijñapti), other beings do not encounter such experience (Viṃ 3, Sems tsam shi). Nor is the lack of causal efficacy of the impressions or representations in the consciousness a problem for the Yogācāra. As in the case of wet dreams, even without a union of the couple, the emission of semen can occur, and so the representations in the consciousness are causally efficient even without the externally real object.