The Nature of Time and Observer-Dependent Reality

Time is perceived as the rate of change in the environment relative to an observer's experience.

### The Nature of Time and Observation in Physics
* ⏳ The concept of time presents a significant mystery in physics, particularly regarding its **directionality** and whether it is **static or dynamic**.
* 🌀 In classical non-constructivist mathematics, the **absence of time** raises questions about its **fundamental nature** in the universe.
* 🔄 To have an observer, a system must be **multi-stable and capable of transitioning between states**, influenced by its environment to form **memory**.
* 🧠 Memory allows a system to **change its internal state deterministically** based on observations, linking **past states to the current state**.
* 📜 By enumerating all possible universe states, some states can reflect **memories of past states**, leading to a timeline through state transitions governed by the **laws of physics**.
* 🔍 Time, from the observer's perspective, is the **rate of change in the environment**, making it **inherently relativistic**, while from an external viewpoint, it is defined by **state transitions**.
* 🌌 In general relativity, an observer follows a **time-like curve**, distinguishing them from entities like photons, which do not change states and thus **cannot observe**.
* ⚛ The ability of a system to **change state** is essential for observation, indicating that even single particles must possess some property that allows for **change without losing their identity**.

I'm not clear what you mean by that. There's a memory of the of the state, but either way, when you say that there's the Big Bang and then there's an entropic arrow, there's a huge mystery, a mystery in physics about the arrow of time, like

what is time, and why does it move forward? Is it static like you mentioned? If we conceptualize the world in classical non-constructivist mathematics, then there's no room for time. What is time in your model? It's time fundamental. Um, I think that if you, uh, want to have

an observer, you need to have a system that is multi-stable and it, it's moving between these states, right? It needs to be able to be influenced by the environment and as a result, form some kind of memory. The memory means that as a result of an observation at the

system-made environment, it's changing its internal state in a particular deterministic way. And the way that we describe our universe, we noticed that we can describe our universe in terms of states, of which some explain this current state by being its past. You could also say, imagine you enumerate

all the possible universe states, and some of these states will look like they contain the memory of past states because they are can be the result of a state transition where you are using a permutation on previous bits. Basically, the laws of physics, and you get to the

next state, and as if you go backwards, you get a timeline, and all the possible timelines in the space of, uh, the enumeration of universe states, these are all the possible temporally extended universes from the perspective of an observer. Time is in some sense, the

rate of change in the environment as observed by the observer, which means it's relative to the rate of change in the observer. So, from the observer's perspective, time is intrinsically relativistic. From the perspective of outside the system, which we cannot take, 

time would be state transition. So, there is a way in which you would enumerate the states by defining a function that orders them. Okay, you just mentioned from the perspective of an observer outside the system. Now, in general relativity, an observer is what follows the time-like 

curve. Okay, so you're in the cone, it can't be space-like, can't be null. Now, if you ask what's what, what the heck is the experience of a photon, we can't do that because an observer is defined as what's in the time-like cone. The thing 

is, the photon is not multi-stable. The photon does not change state, right? That's why the photon is not able to observe. The photon can be absorbed and re-emitted with different properties, but by itself, the photon doesn't change. And only a system that is able to 

change state can observe. And so, whenever you have a particle system like you and me, right, a single one, a single one, though, what about a single particle? Uh, it depends what kind of particle, but uh, so in some sense you can describe every particle system as some kind of a 

compound particle, but it's basically depends on whether you can change a property of that particle without that particle changing its identity, so to speak, right? So, as soon as this model of the particle that no longer applies, you use a different description. 

What is time? Is time fundamental? - Joscha Bach

TOE Clippings

Uncertainty about the nature of time and its forward movement.

Classical mathematics doesn't account for time; questioning time's fundamentality.

The necessity of multi-stable systems and memory for observation.

Describing the universe through states, some explaining the current state through past states.

Possible universe states and their memory of past states through state transitions.

Time as the rate of environmental change observed by the observer; its relativistic nature.

Observers in General Relativity and the Experience of Time

Observers in general relativity follow time-like curves within the light cone.

Inability to describe a photon's experience of time due to its lack of multi-stability.

Only systems capable of state changes can observe; photons don't change states inherently.

Describing particle systems as compound particles, depending on the ability to change properties without altering identity.

Using different descriptions when the initial particle model no longer applies.