 The nature of particulars and properties determines whether the second are predicable of the first or not. Wetzel (1998: 57) fills this suggestion out in an informative way. An object may be in a range of possible states due to its capacities. Given that the computer I am writing on belongs to a particular kind there is a range of possibilities for it to be: it might be broken, functioning well, be turned off etc. Its capacities and, broadly speaking, its nature is the “ontological ground of ranges of possible states of affairs in which [it is a constituent]” (1998: 57). One should add that the nature and capacities of an object also determine a range of impossibilities such as the impossibility of my computer’s becoming a sentient being.