Introduction
The previous chapters introduced the concepts of Pressure and Transport, explaining how an Identity moves through the lattice. However, one fundamental question remains:
Why does transport begin at all?
Before an Identity can respond to its surroundings, it must first detect that one direction differs from another. Without such a difference, every neighbouring direction is mechanically equivalent, no pressure accumulates, and no transport occurs.
The REM Framework calls this local difference an imbalance.
This chapter introduces the concept of imbalance and the Local Imbalance Principle, which proposes that an Identity responds only to locally measured differences in the state of its neighbouring lattice nodes. This principle provides the mechanical foundation for investigating how physical phenomena may emerge from recursive local interactions.
Perfect Equilibrium
Consider an Identity surrounded by neighbouring lattice nodes that are all in exactly the same mechanical state. Every neighbouring direction contains identical information. No direction is preferred over another.
Under these conditions the lattice is in local equilibrium. Since no measurable difference exists between neighbouring nodes, no imbalance is detected, no pressure accumulates, and the Identity remains stationary.
A perfectly balanced environment therefore produces no physical response.
Breaking the Equilibrium
An oscillating Identity continuously generates a recursive source wave that propagates through the surrounding lattice.
As the source wave travels outward, its amplitude gradually decreases with distance from the source. When this wave reaches another Identity, the neighbouring lattice nodes no longer experience identical amplitudes.
The local equilibrium has now been broken.
This difference between neighbouring measurements is called an imbalance.
The Local Imbalance Principle
The REM Framework proposes the following principle:
An Identity never responds directly to distant objects. It responds only to locally measured differences in the state of its neighbouring lattice nodes.
This principle is entirely local. An Identity does not observe where another Identity is located, nor does it require information about distant parts of the lattice. Every decision is based solely on measurements performed within its immediate neighbourhood.
Complex behaviour may therefore emerge from repeated local interactions without requiring any non-local communication.
Measuring an Imbalance
Suppose a recursive source wave approaches an Identity from the left.
Because the wave amplitude decreases with distance from its source, the neighbouring node on the left measures a slightly larger amplitude than the neighbouring node on the right.
In other words,
$A_{left} > A_{right}$
The Identity compares the amplitudes measured by its neighbouring nodes and calculates their difference,
$\Delta A = A_{left} - A_{right}$
This local comparison immediately provides two pieces of information:
- the magnitude of the imbalance, and
- the direction from which the source wave arrived.
The Identity therefore never measures the distant source directly. It measures only the local state of the lattice surrounding it.

Why This Principle Matters
The Local Imbalance Principle introduces a general mechanical mechanism for responding to the surrounding lattice.
In this chapter the imbalance is determined by comparing recursive source-wave amplitudes measured across neighbouring lattice nodes. However, the REM Framework is not restricted to amplitude alone.
Future investigations may reveal other locally measurable quantities capable of defining an imbalance, including:
- source-wave amplitude,
- node position,
- node velocity,
- node acceleration,
- rotational properties of the lattice,
- or other locally measurable quantities that emerge as the framework develops.
Although the measured quantity may differ, the underlying principle remains unchanged: an Identity responds only to locally measured imbalances.
Conclusion
The concept of imbalance provides the missing link between the fundamental mechanics of the REM Framework and the emergence of physical phenomena.
Rather than introducing separate mechanisms for every interaction, the REM Framework investigates whether different physical phenomena originate from different kinds of locally measured imbalances while following the same underlying Local Imbalance Principle.
If this principle proves applicable across multiple phenomena, it may provide a unified mechanical foundation for understanding how complex behaviour emerges from recursive local interactions.
The next chapter investigates the first application of this principle: Gravity.