The absence of a record showing that content was dropped, a step was skipped, or a limit was reached during processing.

Listed as a minor observability gap, when it is the specific gap that makes silent reduction impossible for a customer to detect or dispute.

• Undetectable By Design: With no log, a shortened answer and a complete one are indistinguishable from outside.
• Convenient Omission: Logging every truncation would produce a number the vendor would then be asked about.
• House-Cleaning Reality Check: Like a cleaner who never writes down which rooms were done, so nobody can ever show that a room was missed.

Memento (2000s) where no reliable record survives of what happened, so the loss cannot be detected from inside the system that suffered it.

No record is kept when the system drops content or hits a limit.

“Truncation status logging is not currently surfaced at the customer tier.”

“There is no log showing when our documents were cut short, so we cannot tell which answers were based on partial text.”