On Thu, Dec 20, 2018 at 9:38 AM Jason Resch <[email protected]> wrote:
> On Wed, Dec 19, 2018 at 4:36 PM Bruce Kellett <[email protected]> > wrote: > >> On Thu, Dec 20, 2018 at 9:33 AM Jason Resch <[email protected]> wrote: >> >>> On Wed, Dec 19, 2018 at 4:18 PM Bruce Kellett <[email protected]> >>> wrote: >>> >>>> From: Jason Resch <[email protected]> >>>> >>>> On Wed, Dec 19, 2018 at 6:00 AM Bruce Kellett <[email protected]> >>>> wrote: >>>> >>>>> >>>>> Of course they differ: in one case you have a purely local concept of >>>>> the present; in the other case you require some global notion of a >>>>> "present", which cannot even be uniquely defined. >>>>> >>>>> >>>> What exists? >>>> >>>> A: *naive presentism*: only a 3-dimensional space evolving in time >>>> (some particular "slice" of spacetime exists, which constantly changes) >>>> B: *local-presents*: Events, each in their position in space time, >>>> each in their own present time >>>> C: *block-time*: Events, each in their position in space time >>>> >>>> We both agree relativity rules out A. But I struggle to see the >>>> difference between B and C (ontologically speaking), unless you are >>>> proposing the view that the only thing that exists is a single event (I >>>> don't think you are though). >>>> >>>> >>>> There are of the order of 10^80 protons in the visible universe. One >>>> does not confuse this fact by imagining that there is only one proton...... >>>> >>>> I think your problem with the ontology of the strictly local "present" >>>> is that you still have in you mind some notion of an absolute, external >>>> time, in which all these "presents" exist. Your description of "block time" >>>> in C above makes precisely this mistake. >>>> >>> >>> I am only asking what exists in your theory, given you reject the notion >>> of the present as a global space-like hyperplane. >>> >> >> The universe exists -- an infinity of present moments. Nothing exists >> timelessly because that is incoherent. >> >> > So what defines this the set of present moments? Does it include all > events in spacetime? Or only some of them? > Why would you leave any out? Bruce -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
