There is an important statement, in the Holy Quran, Suratol Hijr 15: 75. \\\'those who examine\\\'. The question is that what does it denote? In brief, the twelve infallible Imaams (A.S), are ‘those who examine’. They can glance at a person, and come to know whether, he is a believer, or a hypocrite. + the first of ‘those who examine’ , was the Holy Prophet (S). after him was Ameerol Momineen. then Imaam Hassan. and Imam Hussain. and after him , the nine purified infallible Imaams (A.S) from his descendants,