The assistant proposes an explanation from limited evidence; you accept it; the application saves it, then shortens or rewrites it as more history accumulates. A later answer uses that summary and confirms your suspicion — and your approval helps preserve it.
Several answers can appear to agree while each depends on the same two emails. A repeated answer does not become new evidence merely because another request produced it. The safeguard that matters: the system must not mistake its own repeated output for a fresh observation.