Rights are undoubtedly to be implemented only when not objected against, otherwise they must be proved and defended. Therefore presumption has the high priority as one evidence when it is relied on in legal proceeding which require to be settled as fast as possible. There are two kinds of presumptions : legal presumption and judicial presumption.

We are going to determine the base , scope and conflict of presumption .The base of presumption is different  which means that legal presumption is based on the permission  of legislature while the other is based on the essential legitimacy of acknowledgment.

There is a general rule and principle which provides that it can be proved contrary to the presumption .

Presumptions conflict with each other or with the other evidences on several occasions. The general principle provides that the knowledge precedes to assumption and indication.

This study determines three subject as mentioned above with the Shiite jurisprudence and Egypt civil code comparatively.