 Also, he is clear that what arises in genuine mixture is not only a composition of simple compounds but also a simple form. In his view, this form is simple “because it is not composed but rather generated” (PT: 42). Consequently, it cannot undergo a process of being split up, although it can perish when the basis from which it emerges is changed (PT). This is why the simplicity and immateriality of emergent forms is compatible with their capability of being destroyed (PT: 44; 276). 