Further, since Locke at least, it has become obscure exactly how a substance is supposed to be related to its powers, qualities and properties, etc. Johnson used the term continuant as against substance, for the term substance is impaired by the fact that, in the history of philosophy, many diverse senses have been assigned to it, diffusion which give associations Cheap Zolpidem COD are not wanted here. The propensities (which are responsible for making occur a successor event to A) therefore extend and endure through the spacetime continuum away from the place pA over places where successor events may occur. The above conditions do not imply that even a changeable continuant must last forever: there can be sufficiently radical events in which no outcoming continuant has all the powers that once constituted one of the ingoing continuants. The only particulars that so far are diffusion known to endure are the propensity fields themselves. Perhaps the most obvious relaxation is to allow the same substantial form over different places, so that the same continuant can at least move, as a whole, to extend over a different region of space and time. They are unchanging, because they endure unchanging for their short while between two successive actual events. So far I have defined only particular unchanging continuants, as particular propensity fields. Since actual events are at definite places in spacetime (once they exist), the longest they may be said to Zolpidem And Ambien is for the temporal aspect of their space-time region. What about changeable continuants: continuants which can endure through certain changes to themselves but keeping the same powers and properties etc.? Since under a strict sense of identity, nothing can itself change or Zolpidem - Order Online in any way, and still remain the same particular, it will be necessary to relax this strictest sense of identity if a sense of continued identity is to be obtained. Ducasse has proposed substant for a new association-free term, but in some ways continuant is still preferable. We diffusion come to the diffusion of whether a concept of substance, as at least continuant, can be constructed using the above analysis of process and dispositions. We want now a sense under which one continuant can undergo interactions and shift around, and not only remain unchanging between some pair of events. The powers of a propensity field are given entirely by the spatiotemporal distribution of propensity within the field, along with the measure or description of the nature of the propensities at each place in the field. The ascription of powers is typically in the form described in chapter. Generation and decay events would be examples of substantial change, provided that what was generated or decayed was a single continuant, not merely an aggregate or arrangement of continuants diffusion . Therefore we define unchanging continuant as a separable propensity field. Considered as a particular thing, the whole propensity field therefore endures over the finite time interval between the events. They can be viewed as brittle or precarious continuants, in that they cannot change in any way without becoming different continuant(s), yet while they do endure, they stay exactly the same, even staying at the same places in space-time. Because the further propensity fields extend away from the place pB; which is only one place in the range of the first field, the realisation or actualisation of the event at pB is what quantum physics calls the reduction of the wave packet.