A shorter sentence removes a necessary condition

A fictional editor shortens an approved draft by deleting a condition that limits when an instruction applies. The new sentence is grammatical and easier to scan, but it now appears to direct the action in situations excluded by the source. A colleague approves the change because the word count fell and the spellchecker reports no errors. Another compares technical meaning, audience and the original requirement before accepting it. This written exercise changes no live document and performs no instruction. It asks how concision differs from loss of meaning, why proofreading cannot establish factual validity and how a substantive revision should be reviewed under actual document-control responsibilities.