# From a sentence to a fact to an answer.

How it works · Human page: https://quelvio.com/how-it-works · Machine view: https://quelvio.com/ai/how-it-works

Search finds passages that look relevant. Quelvio writes down what your sources actually establish, and keeps track of who said it, and when.

[Request early access](https://quelvio.com/early-access) · [Quelvio for AI agents](https://quelvio.com/agents)

## Read, write, relate, answer, trace.

1. **Read**: Documents and agent sessions, one sentence at a time.
2. **Write facts**: Each fact keeps the sentence it came from, who it belongs to, and when it was stated and holds from.
3. **Relate**: Facts that agree or disagree are linked, and each keeps its history in time order. Facts are grouped by topic and entity.
4. **Answer**: Answers quote the facts they rest on, or decline when the sources don’t settle the question.
5. **Trace**: Every step is recorded. Open a reading or an answer and replay how it was built.

## Every fact keeps its source.

One sentence from an approved policy becomes one fact, with the four parts that make it checkable.

1. **The sentence**: quoted, with its document and line.
2. **Who it belongs to**: the person, team or party it comes from.
3. **When**: the date it was stated, and the date it holds from.
4. **How it relates**: the facts it agrees with, disagrees with, or came after.

## Every step can be replayed.

The trace of a decline: the question, the facts found, the sources checked, what the sources cover, and the decision.

## Watch it happen.

The Lab is where you see Quelvio work on your own repositories.

- **Repositories**: what each one holds, and who can read it.
- **A reading you can watch**: documents becoming facts, sentence by sentence.
- **The graph**: facts connecting as they agree, disagree or follow one another.
- **The trace viewer**: press play on any reading or answer.
- **Memory**: what each agent remembers, and its stewards’ decisions.
- **Topics and entities**: everything known about one thing, in one place.

## Retrieval finds text. Quelvio keeps facts.

- Retrieval: Returns passages that look relevant. **Quelvio: Returns facts, each with its source sentence.**
- Retrieval: The newest or most similar text wins. **Quelvio: Who said it, and when, is kept with each fact.**
- Retrieval: Always produces an answer. **Quelvio: Declines when the sources don’t settle it.**
- Retrieval: Hard to audit afterwards. **Quelvio: Every step can be replayed.**

## Bring us the question your agents get wrong.

Early access is by invitation. Tell us what your agents need to know, and where they slip.

[Request early access](https://quelvio.com/early-access) · [Talk to us](mailto:q@quelvio.com)

## Related

- [Human view of this page](https://quelvio.com/how-it-works)
- [Everything for agents: llms.txt](https://quelvio.com/llms.txt)