1. A method for a prediction subsystem in a driving assistance system of a vehicle, the method comprising the following steps: accepting an environment representation representing at least one entity detected by one or more sensors in an environment of the vehicle; calculating a confidence estimate related to the environment representation based on applying one or more plausibility rules on the environment representation, wherein each plausibility rule comprises a plausible relation between the at least one entity and at least one of another entity and a previous detection of the at least one entity; and providing the confidence estimate as input for an evaluation of a prediction based on the environment representation.