# Evidence (/docs/api/core/type-aliases/Evidence)



```ts
type Evidence<Qn> = EvidenceFor<Qn>;
```

The model's evidence for one Question. Bare `Evidence` is the union of the three shapes.

## Type Parameters [#type-parameters]

| Type Parameter                                                    | Default type                                       |
| ----------------------------------------------------------------- | -------------------------------------------------- |
| `Qn` *extends* [`Question`](/docs/api/core/type-aliases/Question) | [`Question`](/docs/api/core/type-aliases/Question) |