# Choose a mode for assumptions

## Intention

I want to evaluate an assumption in an explicitly chosen mode.

Each mode accepts only the fact origins it names.

## Incorrect form and why it stays silent

A typo does not select the nearest mode.

```law title="Incorrect form"
context { mode simulaton; }
```
The correct word simulation also matters: outside it, assumed_for_simulation is not accepted.

## Correct form

Mode is set as a context axis.

```law
language "law.core" version "0.2";
package recipes.n.r08 version "0.1.0";
namespace "urn:recipe:n-package:08";

relation assumed();
case Experiment {
    context { mode simulation; }
    assert assumed() { origin assumed_for_simulation; }
}
```

## Frozen execution scene

| Facts | Question | Answer |
|---|---|---|
| assumed_for_simulation, simulation | assumed() | TRUE_ONLY |
| Same, compliance | assumed() | NEITHER, ASSERTION_NOT_ACCEPTED |

```law
test "simulation accepts assumption" {
    given {
        context {
            legal_time @2026-09-13;
            decision_time @2026-09-13T09:00:00+05:00;
            knowledge_time @2026-09-13T09:00:00+05:00;
            timezone "Asia/Almaty";
            mode simulation;
        }
        assert assumed() { origin assumed_for_simulation; }
    }
    evaluate truth(assumed());
    expect truth_status == TRUE_ONLY;
}
```

```law
test "compliance rejects assumption" {
    given {
        context {
            legal_time @2026-09-13;
            decision_time @2026-09-13T09:00:00+05:00;
            knowledge_time @2026-09-13T09:00:00+05:00;
            timezone "Asia/Almaty";
            mode compliance;
        }
        assert assumed() { origin assumed_for_simulation; }
    }
    evaluate truth(assumed());
    expect truth_status == NEITHER;
    expect issue(ASSERTION_NOT_ACCEPTED);
}
```

## Counterfactual

`teaches` corrupts the mode name and requires LDC-E1353. The second scene keeps the fact, changes only the lawful mode, and pins the acceptance rejection.

## Boundary

Mode does not rewrite norms. Mode may affect the result only through an explicit policy; a court fact and a judgment belong to the evidence and interpretations books.

## Pitfall

An assumption outside simulation stays Not established, not refuted, with ASSERTION_NOT_ACCEPTED. The fix is to choose simulation explicitly, keeping the origin, not to recolour the fact as case_input.