In this context the term “presumption” should not be confused with the concepts of rebuttable or non rebuttable presumption. In general, a presumption is a rule which permits a court to assume that a fact is true until a preponderance of evidence disproves or outweighs (rebuts) the presumption. A presumption is rebuttable if it can be refuted by factual evidence, on the contrary, it is conclusive or irrebuttable if the presumption does not provide for a way to be disproved.