**Solution**

We plant two zygotes and let the CA grow.
(compare with chapter 47). At t = 20 CA-2 starts
controlling CA-1, while CA-1 does not control CA-2. As CA-2 product interacts
with CA-1 structure, it
gradually evolves. At t =100 CA-1 starts oscillating at a period
of 46 and becomes stationary (steady state). All subsequent experiments
start at t = 150.

The following picture depicts the two CA and their production
profiles.

**Affinity is defined here as interaction intensity**. At low affinity, CA-1 is chaotic. At affinity = 2,
one CA-1 border oscillates at a period 46, while the oscillation of the
other border is irregular. At higher affinities CA-1 becomes broader while
its product does not change. It becomes less and less
healthy.

**Solution**
A stationary process responds to external perturbation
(injury) in four ways:

1. No change,

2. A new
stationary oscillating attractor.

3. Chaotic
oscillations

4. Death

When the CA settles at a stable attractor, its response is regarded here as a **solution** which it created in response to the perturbation .
A chaotic oscillation is not a
solution since it is unstable. Throughout the chaotic phase CA
seeks a solution otherwise it dies. The
fate of an isolated CA is controlled
by a **triplet : {state, rule#, max age}. **A solution is defined as a **stable** quadruple: **{perturbation,
state, rule#, max age: stable}**, which is the **key feature of WOB**.
The body is continually exposed to perturbations for which **WOB always
finds (creates) an optimal solution**, as manifested by Homeostasis (Homeorhesis).
Homeorhesis is always an optimal solution.

We shall therefore
focus on solutions in general, and optimal solutions in particular. The
last image illustrates what is meant. The first two CA are chaotic and therefore are not solutions. CA whose
affinities are 3 or greater, are solutions yet less and
less optimal (healthy)

**Setup**

injurystate[1,
j, 1, 1000, f[[2, 1]], 3. nowdat[[2,10]],1]; injurystate[1, j, 1, 1000,
f[[2, 2]], 3. nowdat[[2, 10]],1];

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