BAHMAN
That is not true. Time can pass without any other change.
I'm inclined to disagree. Consider it this way - the reason time didn't exist before the universe existed is because there is no change occurring when nothing exists. This makes sense if time is a marker of change.
Similarly if the universe had popped into existence in such a way that it was static and unable to ever change, time within the universe wouldn't exist. Because there is no change to mark.
The alternative is to see Time as a thing in itself, which flows regardless of anything existing or changing. But that sort of thing in itself Time would have no properties or effects, including flow in a non-existent or static universe. Or there'd at least be no discernible difference in whether it existed or not, there'd be nothing to identify or describe as Time Itself.
Which I suppose boils the question down to whether it is in the nature of stuff to change in certain ways which time marks, or time is an existing medium of sorts through which stuff changes, a medium which simultaneously comes into existence with stuff. A linguistic parallel would be to classify time as an adverb, or Time as a noun.
If we compare time to spatial dimensions, I'd say spatial dimensions also reference and mark the spatial physical properties of physical stuff, like the way an adjective works. Once stuff exists, it can be described and marked in spatial dimensions because of the properties stuff has (hence no stuff = no spatial dimensions). Likewise when stuff changes according to its own properties (matter being acted on by forces according to physics) time marks those changes. If there are no changes to mark, time is meaningless, because there is nothing for time to reference.
My question to you then, is if Time is a thing in itself, what is it? And if it has no discernible independent properties or efects of its own, except as a marker of stuff changing, in what sense does it exist?
Well, we need to agree on whether time is necessary for change to happen. If we agree on this then it follows that time exists regardless of change. How? Consider a system S which is subject to change by which I mean there is a set of parameters, let's call it P, that defines the system and they are subject to change. Now assume a change in the system, P to P', where P is at time t and P' is at time t'. The difference between P and P' tells how big is the change. This difference could be large or small though the difference between t and t' is always constant. Now consider a very very small change. Again, the difference between P and P' is the only thing that changes while the difference between t and t' is constant. So as you can see, time and change are two different independent things. You can have arbitrary change during the time interval which is constant. Time in other words changes constantly regardless of how much the change is.
The form of your question ''is time necessary for change to happen>'' doesn't capture a concept of time I agree with. Because I think time is a marker of change, rather than time being something which independently exists in order for change to happen.
Time as an independent thing in itself, without change, is meaningless. Why? Because, I think, time results from acts of change, which result from the properties of forces which act on matter.
So I think what needs to exist for change to happen isn't pre-existing time, it's the properties of the stuff of the universe (according to physics - forces acting on matter). When those properties manifest, change occurs. Change necessarily happens over a period time, but it's the change itself which manifests the temporal difference.
I agree that changes in systems can happen at different rates/speeds, but these can theoretically be explained by forces acting on matter in different ways. Time marks those differences generated by various physical processes. As I said, it's analogous to spatial dimensions, it's the nature of forces and matter from which dimensions arise. If matter and forces don't exist, their dimensions don't exist. If matter and forces don't change, time doesn't exist.
If you believe time can exist in a completely static universe, I'm still unclear what you think it exists as?
Gertie wrote: ↑Today, 9:03 amGertie wrote: ↑Yesterday, 1:11 pm I know change exists because my conscious experience changes. I assume the change in my conscious experience represents the sequentially changing universe my experience represents. (Time being relative doesn't mean it doesn't exist as marking change, just that how we experience and measure it is relative, I think).
And I understand logic to be a human concept which is rooted in our observation and understanding of how our universe works.
Now within our already existing universe as we experience and understand it, to say time/change/anything is created out of nothing/no time/no change at a particular temporal moment seems illogical. Because we live in a pre-existing universe and only understand time as marking the change from one state of affairs to another, which we experience and have coherent and reliably predictive ways of explaining.
However, if we're talking about the creation of our universe, we're considering a different state of affairs we call 'nothing' (aka not our universe) and we have no access to how things work 'outside' or 'before' our universe. If or how time, stuff changing, or logic can make sense to us outside what we can access from within our universe. So for example if we're considering the existence of some creative force which is responsible for the existence of our universe (including time, stuff and logic as we experience/understand it), we have no way of knowing what the conditions in which such an act of creation might or might not occur. That's assuming the notion of 'outside our universe', or outside what is epistemologically accessible to us, is itself meaningful.One of the main premises is that any act requires times since any act deals with a change. Agree or disagree?As explained above, I agree in the sense that time marks the change. But not convinced that time is some sort of thing in itself medium necessary for stuff to change within.
So I assume that you agree that time is needed for any act.
See my previous answer in this post.
Gertie wrote: ↑Today, 9:03 am
The other premise is that there was no time before the point of creation. Agree or disagree?
Agree, because if nothing exists, then there is no change for time to mark.
Not in that sense. In the sense that if nothing exists, then time does not exist either.
Yes, and I was explaining why. The reason why matters, because it leads us to different conclusions.
Gertie wrote: ↑Today, 9:03 amGertie wrote: ↑Yesterday, 1:11 pm We can speculate, but using our 'in-universe' notions of logic based on how our universe seems to work to do so, could well be simply not understanding the implications of trying to say anything about what is outside what we can know or understand. Or if it even makes sense to try.
On the other hand if we consider our universe to be eternal/infinite having no temporal beginning, we run into apparent paradoxes, in which our logic seems incapable of reconciling our universe's infinite past with reaching this point now, and now, and now, like Xeno's arrow. Or how our spatially infinite universe which encompasses everything can expand
.Eternal universe is illogical since it takes infinite amout of time passage to reach from infinite past to now.
Agree, according to our human in-universe knowledge about how the universe we're in works. But we don't have access to/knowledge of the state of affairs, if any, not included in what we can recognise as our universe.
Inconclusive conclusion -
Our logic based on what we flawed and limited humans observe about how our universe works has problems with both creation ex-nihilo and an infinite past. Our human logic suggests it has to be one or the other, but can't unproblematically get us to either.
Answer - dunno.
Well, if we accept two premises then it is easy to show that the act of creation leads to an infinite regress. Agree?
The problem with saying yes/no is that your premises entail a concept of time as something we treat as a thing in itself which is different to mine. Here's your original post -
Act of creation from nothing is logically impossible
To show this we first notice that any act including the act of creation has a before and an after. This means that time is needed for any act since there is a before and an after in any act. The act of creation however includes the creation of time as well. This means that we need time for the creation of time. This leads to an infinite regress. The infinite regress is not acceptable. Therefore, the act of creation from nothing is logically impossible.
I don't think ''before'' could exist prior to a first act of creation,
because change couldn't exist prior a first act, if I'm right about time being a marker of change. That avoids the infinite regress problem you raise, but runs into the something from nothing problem.
TLDR where I'm at -
I think time is a product of the nature of the stuff of the universe (per physics - forces acting on matter), in that it marks (refers to, measures) the changes inherent in natural processes.
The alternative you posit is that Time exists as something in itself (not yet described), flowing along independent of change at its own 'objective' self-referential rate, which matter and forces 'dip into' at certain points in its flow when change occurs.
Time could be either (or something else beyond our ken), the former makes more sense to me because -
- There is nothing discernible to identify as independently existing Time in the absence of change. What is time sans change, if there's nothing there to be identified as having independent properties?
- If we think time is a dimension of sorts, then I consider spatial dimensions to similarly be a product of the properties of the stuff of the universe. In that dimensions result from matter having 3D properties, they are not things in themselves which exist independently of the existence of stuff. This is why nothing has no dimensions, similarly nothing has no time because there is no change.