Not

This function is a Qualifier Function. This function returns true if the condition is not true.

Example

navigate("google.com", "Wait")
if($not($exists(<innertext="Video Training in Ten Minutes or Less!">))) {
    then {
        navigate("http://www.ubotstudio.com/resources", "Wait")
    }
    else {
    }
}

The above script will navigate to the specified url int he navigate command in the Then command if the attribute in the exists qualifier does not exist on the page.