4.1 Communication without the speaker
The linguistic message can be encountered after the producer leaves or dies.
4.2 Durable propositions
Names, obligations, decisions and narratives become inspectable records.
4.3 Exact quotation and contest
Writing can preserve wording more closely than memory, enabling later readers to compare, interpret and challenge it.
4.4 Administrative scale
States can coordinate taxation, law, property and correspondence across distance.
4.5 Cumulative knowledge
Readers can build on work outside their own memory and generation.
4.6 Reproduction
Texts can be copied, standardised and later mass-produced.
4.7 Search and indexing
Once organised into archives, catalogues and digital systems, written information becomes selectively retrievable.
4.8 Metalinguistic reflection
Language itself becomes visible enough to analyse, edit and teach.