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# Silent mutation risk

Silent mutation risk is the chance that state changes without an explicit, inspectable trail. High-risk systems can overwrite or drop facts without leaving evidence.

## Before vs after

Before: a contact field changes after an agent run and nobody can tell when or why. After: every field change is an observation, and lineage can be queried by entity and timestamp.

\# Inspect mutation trail for one entity
neotoma observations list --entity-id <entity\_id>

# Verify relationship links for source context
neotoma relationships list --entity-id <entity\_id>

Deterministic systems prevent silent mutation by design through [auditable change logs](/auditable-change-log) and [versioned history](/versioned-history). See [conflicting facts risk](/conflicting-facts-risk), [false closure risk](/false-closure-risk), and [deterministic memory](/deterministic-memory).