```
ID: f-p8-decay-const2
Type: f

H3. The same accumulation as the baseline, with a constant fall-off of 2 instead of 1.
const: falloff = 2

THE ONE-CONSTANT CONTROL. With #f-p8-decay's (8, 1) and generation 4's retained (255, 2) runs, this
is (8, 2): the corner of the square that was never measured. The attribution of generation 4's gain
stops being an inference from a Python grid and becomes three runs.

HISTORY.
Generation 5, A2's idea (#f-p8-add) restated on the cap-8 delivery. Generation 4 could only compare
(255, 2) against (8, 1); the two constants moved together and the grid had to argue which one
carried the gain.

The derivation the 2 came from -- each atomic pattern applied at rate f, the sum copied to both
neighbours at rate f each, so the fall-off must be 2f -- was WITHDRAWN by MJC in generation 3: there
is no constant sum in an ES. The 2 survives here as a measured constant with no argument behind it,
which is exactly what a control is.
```