Scar attribution

For a common checkpoint and specified intervention policies, compare scar-enabled and comparison branches under the same probe law:

A paired lower confidence bound greater than zero certifies that named computational contrast.

Immediate deletion versus no deletion changes effective weights and active masks. Permanent versus regrowable deletion should start with the same immediate deletion and differ in future eligibility. Later weight changes can be mediators of that policy contrast.

A scar–accuracy correlation across cycles does not isolate this effect: maintenance, gain, activation, challenge, and random inputs can change concurrently. The counterfactual distinctions are those of Psy03-B CheungPsy03B.