Hold the physical dose equal
At each dose, forward and backward used the same number of founder-pair swaps. Only the information-defined direction differed.
A stronger information-directed push made the later founder mixture remember which founder acted first—even after another founder action arrived.
The first experiment suggested that a Φ-forward nudge made later spatial dynamics harder to overwrite. This experiment repeated the intervention at three strengths, under a new future, and asked whether causal memory changed with dose.
At each dose, forward and backward used the same number of founder-pair swaps. Only the information-defined direction differed.
Each early state received weak, medium, or strong matched swaps: 6%, 12%, and 20%.
After actions A and B, we measured how much A remained visible in the spatial field and in the mixture of founder identities.
The specific medium-dose spatial result did not repeat in this unseen future. But the dose curve exposed a broader response: the forward–backward difference moved from negative to positive in both channels, and founder composition separated cleanly at high dose.
At 20%, compositional first-action memory was 0.00678 after Φ-forward and 0.00526 after Φ-backward: a difference of +0.00152.
The early information direction changed how strongly the later ecology remembered who had acted first.
This is a mechanistic follow-up on the same 19 families under an unseen future—not an independent population replication. The frozen medium-dose field-memory endpoint was not reproduced: +0.00042 [−0.00497, +0.00495]. The positive result is the predeclared dose response in founder composition.
The compositional separation did not come from indiscriminate disruption. As dose rose, Φ-forward kept first-action identity memory roughly intact. Φ-backward progressively removed it.
At high dose, the same second action B overwrote less founder-identity information about action A in the forward state than in the backward state.
The field channel tells a complementary story: its forward arm tended to strengthen with dose while its backward arm stayed flat, though that decomposition remained uncertain.
If the effect were only a mechanical scar, it would be largest immediately. It was essentially absent at passage 1, emerged around passages 5–6, and remained dose-ordered late in the trajectory.
Four family-schedule states offered no directional leverage: the forward and backward selectors chose exactly the same local swap. Those paired futures collapsed pathwise at every dose.
The simulator was not quietly labeling one arm “forward” and producing a difference by itself. When the physical state was identical, the later fields and founder compositions were identical too.
Across all other states, forward and backward still used equal swap counts at each dose. The measured manipulation separated the information score most cleanly at 12% and 20%, before the unseen future was run.
The result is not yet “Φ makes an organism.” It gives us a sharper instrument: a dose that can preserve or erase causal history. The next experiment should use it before an organic body has formed and ask whether it moves the commitment transition itself.
Is the birth of an organism the moment when a previously fluid ecology begins to preserve its own causal history?
If Φ-directed intervention can move that boundary—earlier or later—then we are no longer merely detecting an information signal. We are controlling a candidate mechanism of developmental commitment.
The present result establishes a dose-ordered change in founder-composition action memory on these 19 families. It does not establish causal emergence, autonomous replication, or a population-wide law.