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John,
Thanks then if that is what you mean then I'm with you; the things can age at different rates but 'clock' time is the same for both. IE the different amounts of change are occurring fully simultaneously. That fits with my thinking that there is only that simultaneous existence and no other 'When' to be at.
Is ageing passage of time? I can rememberer someone saying to me that we age because of passage of time and I said of course we don't and then something about it being accumulation of the deleterious changes to our biology. However from your point of view its the changes to the individual causing the passage of time for him. If we do take -all- change to be passage of time in that way each system we look at will have its own time based upon changes -to it- and not changes to the environment that it is within. We sort of have that intuitive impression already, that time passes slowly for a mountain, rather slowly for a tree, fast for a mouse and very fast for a fly. I don't disagree that that is happening but I think something else is going on simultaneously which affects everything.
The spin and orbit and movement of the Earth as it moves with our star system affects everything on the Earth even if they feel they are not moving.(My boxes should have been on a try so they could be moved 'without moving them') That will happen regardless of the changes happening to each individual system on the Earth. Which is why it seems more like tradition notion of passage of time. That planetary motion could be described as continual minimisation of potential energy. The default motion when no additional (counteracting) force is applied.
I think your idea is more radical. That we should scrap any notion of time passing uniformly for everything and just think about kinetic energy and individual lifespans. That's duration or persistence of an identifiable individual arrangement. Paul would argue that as those individual systems will change, they are not the same individual thing. He has a point, even the notion of duration is a bit dodgy. Where is the cut off between regarding something as the same object or a different object? How much change can it undergo? Caterpillar to butterfly? Is that duration of an individual arrangement as it is still one organism or massive alteration of an individual arrangement? How do you compare duration when different arrangements undergo different kinds of change? How should duration be measured? Should we just compare anything to anything else regardless of the kind of changes occurring rather than have a set measurement scale?
I'd like to compare whole arrangements of Object universe universe to itself.IE How it was to how it is. Not possible -so I'd like to compare the whole Earth how it is to how it was. The interval between comparisons is arbitrary. To get an interval I need some kind of change that affects everything together. Which could be rotation the Earth, or spin of the Earth. Giving years or days. Now I can have two iterations of the arrangement to compare, a before and after and now a temporal comparison can be made.
In the past it was like that but now it isn't its like this. Time comes from that imagined historical sequence because that gives a before and an after and the changes can be ordered, even though there is only the youngest arrangement in existence. To get my interval there has to be a change applicable to all matter under consideration. Even the substance at absolute zero (for which subjectively time has stopped, by your criterion) will be moving with the complete motion of the Earth. It will therefore not have absolutely no energy and will undergo the same global passage of time as everything else.