Another objection that Vasubandhu answers is that of how one person can influence another's experiences, if everything arises from mental karmic seeds in one's mind stream. Vasubandhu argues that "impressions can also be caused in a mental stream by the occurrence of a distinct impression in another suitably linked mental stream." As Siderits notes, this account can explain how it is possible to influence or even totally disrupt (murder) another mind, even if there is no physical medium or object in existence, since a suitably strong enough intention in one mind stream can have effects on another mind stream. From the "vijñapti-mātra" position, it is easier to posit a mind to mind causation than to have to explain mind to body causation, which the realist must do. However, Siderits then goes on to question whether Vasubandhu's position is indeed "lighter" since he must make use of multiple interactions between different minds to take into account an intentionally created artifact, like a pot. Since we can be aware of a pot even when we are not "linked" to the potter's intentions (even after the potter is dead), a more complex series of mental interactions must be posited.