Erasure-strength

A force may also act to reduce the persistence of records written by other forces.

This is a distinct quantity. It needs its own symbol.

Definition 3 (Erasure-strength). Ε(F, s) ≤ 0 is the expected change in persistence time induced by F in configurable records written by other forces at scale s.

A force has negative erasure-strength at scale s if its primary effect at that scale is to reduce the persistence of records.

β-decay alters nuclear identity. The nucleus of an atom embedded in a molecule changes element. The electromagnetic bond network that depended on the old nucleus must reorganise.

The weak force at the chemical scale is an eraser. Ε(Weak, s_chem) < 0.