You show up and the tutor asks one thing at a time: what was lost, where that loss was recorded, what reason went into that record, and whether that reason was seen happening or is a guess. From your answer, it spots the gap: if you're speaking from memory, it asks for the record; if the reason is a cause you didn't see, it goes back to "unknown."
It compares logging a loss to counting what's left on the shelf when you close up: when something's missing and you saw what happened, the reason is known. When something's missing and nobody saw anything, the reason stays unknown until proof shows up. After rebuilding that logic with you, the tutor asks you to repeat it in your own words: "every loss, I log what was lost and the reason, when I actually know it; when I don't, I write unknown."
You leave the session with one request: log one real loss that happened in your store, with what was lost and the reason. Next time you come back, it asks what was lost and what reason got recorded, checks the record, and fixes only the point that got stuck, without repeating the whole explanation.