Asking questions
An ordinary question does it.
— What do we know about Olympus's delivery dates?
The assistant breaks the question into concepts, searches on each, and returns the facts, the events that fit and any instruction on the subject.
Asking as of a date
— What was his role in 2019? — What did we know about them when the contract was signed?
The answer is as of that date: what closed earlier is not in it, and neither is what began later.
History
— How did his role change?
You get the chain with dates: what it was, what it became, when it changed.
Everything about one thing
— Show me everything on Olympus Moscow. — Show me only Ivanov's family connections.
Events
— Find where we discussed price. — What was written down in the last week?
The first is a search by meaning, the second a browse by time.
When nothing comes back
Ask it differently. Search runs by meaning; part numbers and codes are found by exact words, wordings by proximity. "Delivery delay" and "dates slipped" are different things to a search, and both will be found if you ask both ways.
Check the area. Search is usually narrowed to an area. Ask for all of it: "search the whole memory, not just work".
Ask for a looser floor. Retrieval has a similarity floor and the assistant can lower it. "Search more loosely, show me even distant matches."
It may simply not be there. Ask straight out: "did you actually write that down?" — the assistant can tell "not found" from "never written".
Where an answer came from
Every fact in an answer shows when it became true, which event it was drawn from, and how it was found: by its text, through a linked entity, or by exact words. If an answer looks odd, ask for the original event in full — that is your own account.