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**.

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.