# Mismatch (/docs/api/core/interfaces/Mismatch)



`actual` is `undefined` when the Decision has no answer for the Question.

## Properties [#properties]

### actual [#actual]

```ts
actual: AnswerValue | undefined;
```

***

### expected [#expected]

```ts
expected: AnswerValue;
```

***

### question [#question]

```ts
question: string;
```