URFT doesn’t just simulate motion — it simulates memory. In this lesson, we explore how ripple fields can lose symmetry, collapse into entropy wells, and then reawaken through resonance. This is where URFT breaks from classical wave systems: collapse isn’t an ending — it’s a reversible state.

🔹 Section 1: Entropy Without Temperature

In classical thermodynamics, entropy is tied to temperature and probability.
In URFT, entropy emerges when ripple motion becomes irreversible due to asymmetry, fidelity, and containment.

A ripple that reflects symmetrically is reversible.
A ripple that loses shape, splits, or gets absorbed is not.

URFT tracks this entropy through the decay of Φ symmetry and momentum over time.

🔹 Section 2: Collapse Wells - When Change Dies

When fidelity increases beyond a critical threshold, ripples slow, shrink, and eventually freeze.

These collapse wells act like black holes — not gravitationally, but dynamically.
They absorb ripple motion and trap it, reducing the system’s ability to evolve.

This is change death — entropy without heat.

🔹 Section 3: Rebound - The Return of Memory

Classical systems cannot reverse entropy. But URFT can — if you inject a tuned resonance pulse into the collapse zone.

This resonance matches the trapped ripple’s memory structure and amplitude.
When aligned correctly, it causes the collapse zone to rebound, restoring motion, symmetry, and energy distribution.

This is not time travel — it’s ripple reactivation.

🔹 Section 4: The Simulation Engine Behind It

All of this behavior arises from the same evolution equation introduced in Lesson 1:

Φₜ₊₁ = 2Φₜ − Φₜ₋₁ + Δt² [ c² · ∇·(R · ∇Φ) − Λ(x, y)Φₜ ]

Collapse happens when Λ(x, y) is high and R · ∇Φ approaches zero.
Rebound occurs when Φ is forced to align with the collapse memory — and fidelity can no longer suppress it.

🔹 Section 5: Why This Matters

URFT doesn’t just track energy. It tracks structure, memory, and the possibility of return.
This means entropy is not a constant but a field property — and reversibility is always possible under the right echo conditions.

URFT redefines what collapse means — and what rebirth can be.