There are three states a component can be in from the inspector's point of view — observed present, observed absent, and not located — and only the third is honest when a search has failed. Reporting a suspected but unfound system as absent asserts a negative the inspection did not establish, which can send a client to install something that already exists or to assume a protection is missing when it is not. Reporting it as present asserts an observation that was never made. Omitting it hides the open question entirely. Recording that it was not located does three useful things: it tells the client the question exists, it tells them the inspection did not answer it, and it lets them ask the seller directly, which is usually the fastest route to an answer.