Rebuttable presumption – in practice, usually at Court Trails if certain other facts are proven, then another fact (considered as a presumption) can be taken for granted by the judge or jury. Most presumptions are “rebuttable”. This means that the person against whom the presumption applies may present evidence to the contrary. This then has the effect of nullifying the presumption. The evidence, called “rebuttable evidence”, then deprives the person that tried to use the presumption to the advantage of the “free” evidence. And respectively makes him present evidence to support the fact which the presumption proves.