Hobbes' Choice wrote:
Point one is nothing more than a definition. In practice what we take to be the Universe is everything that appears to exist.
Quite so. The Universe is everything that exists is simply a statement of definition but it's worth pointing out that it's the opposite statement of definition from that which Newton proceeded and only one of us can be right. However if we accept that the first law is a statement of metaphysical first principle then there follow a number of significant follow up statements which we can deduce from it.
1. If the universe is everything that exists then nothing exists external to it and thus it had no beginning. Ex nihilo, nihil fit. The universe has always existed and is thus eternal.
2. The verb "exists" in this statement is a verb in the present tense, which means we can simply rephrase our definitional statement as "The universe is that which is existing". This defines the universe as an event rather than as a place and the notion of the event implies both a past and future tense to the verb "to exist". The universe is a PROCESS. Thus we deduce that the universe has always existed and will always continue to exist but the notion of its "state of existence" is only meaningful in the nexus between these two verb tenses, the moment Now. Therefore this is a simple statement of presentism.
3. Newton's assumption of a law-derived universe is inapplicable in an eternal process model because no explanation for the origin of such laws is possible, so this model defines the universe as SELF-CAUSAL. This Spinozan notion of immanent cause means simply that the past MAKES the present and the present MAKES the future, a self-evident statement of the nature of determinism which conflicts with Newton's understanding of the concept. Newton adhered to the Platonist principle of transcendent cause, a principle which contradicts the definitional proposition.
4. This model of reality demands an acceptance of the notion that the arrow of time is likewise an ontologicallky valid concept and that time, change and causality are simply three different ways of saying the same thing, namely that the universe is simply that which is continually re-making itself. I've occasionally used the word "continuously" in this context but I'll have to stop doing so because the philosophy of the quantum, as illustrated by Zeno, requires that this process cannot be continuous but must proceed in discrete and quantised steps. It is from this that I derive my concept of the universe as a computer, the "it from bit" entity of Wheeler's dream, and the speed of light as the processing speed of this computer.
5. This processing speed is the most inconstant speed in the universe, because it is variable all the way down to the Planck scale because of gravity, and it for this reason that the eternal universe is the only coherent narrative for quantum gravity.
Essentially the rest of my philosophy is simply a matter of fleshing out the story and filling in the gaps but I do not gild the lily when I say that this more coherent narrative is not only more consistent with the evidence but it also makes EVERY SINGLE paradox and counter-intuitive conclusion which derives from the spacetime narrative simply vanish. We have a statement of definition from which we can logically deduce a meta-law of causality and this is all that is needed to account for ALL of the observable phenomena in the universe. The manner in which these observable phenomena manifest themselves to the observer is not specified by reality but is specified by the observer, a simple Kantian statement which any philosophy undergraduate would be expected to understand.
We imagine that we observe reality but this assumption is illusory. What we observe is simply INFORMATION being projected through time to our senses from events which occurred in our past. It is from this information that we compile our own subjective narrative of the world, which in modern neuroscience is known as our "cognitive map". Because humans have evolved the gift of complex language this map is not only subjective but inter-subjective, which means we all compile essentially the same narrative of the world through the mechanisms of learning from each other. This is both a blessing and a curse because it greatly enhances our ability to comprehend the world around us but it inexorably draws us into the hazards of confirmation bias and group-think. The unexamined mind is a loose cannon which careers through its journey of existence at the whim of the inter-subjective fashion of the day mistaking it for truth.
This is what happened to physics when it decided to ontologise its toolkit.
Hobbes' Choice wrote:
Can I take it then the evidence which has led science to the BB can probably be dismissed as 'yet another fucking appearance-saving cosmology",
No. The evidence which supports the BB is overwhelming under either the created universe or the eternal universe paradigms. However the way in which this evidence is interpreted is vastly different. For instance, instead of expanding our universe is merely aging, just like the rest of us.
Hobbes' Choice wrote:I think the BB is such a unique event that the proponents of it would have to agree that the moment of (ahem) "creation" for want of a better word, would also involve the creation of the laws of physics themselves, as, were such laws to be in place for all time (uniformly) such a thing could not take place.
I agree. A created universe implies a law-mandated reality whereas an eternal universe is self-causal. These are two entirely different ways of defining determinism which are mutually exclusive. One of them must be false, and my seven year old grandson could tell you which one is bullshit because he knows better than anybody that the future is a blank slate on which the story of reality is yet to be written. The world is his oyster.