A PRESUMPTION IS AN INFERENCE OF THE EXISTENCE OR NON-EXISTENCE OF A FACT WHICH COURTS ARE PERMITTED TO DRAW FROM PROOF OF OTHER FACTS:

     Presumptions are classified into presumptions of law and presumptions of fact. Presumptions of law are, in turn, either conclusive or disputable.(In The Matter of the Intestate Estates of the Deceased Josefa Delgado et al. vs. Heirs of Marciana Rustia Vda. De Damian et al. G.R. No. 155733 January 27, 2006 Corona, J.).