Change a fact. Ask again.
Edits are written to your session's copy-on-write overlay, keyed to the single cell (entity, relation). The shared base is read-only at the filesystem level, your edits are invisible to every other visitor, and they expire on a timer. Nothing here is permanent, which is why you can do it at all.
Pick an entity to see the cells held for it.
Adding a document is P3
Editing changes one cell. Reading a whole document into its knowledge goes through the gate, which decides per fact whether to write, skip, flag a contradiction, or drop the write; see Grow (P3).