not boolean expression

is it posible to implement a `not` boolean expression? 
Example:

```
conditions: {
    not: {
      all: [{
        fact: 'gameDuration',
        operator: 'equal',
        value: 40
      }, {
        fact: 'personalFoulCount',
        operator: 'greaterThanInclusive',
        value: 5
      }]   
    }
},
```