Is it obligatory to act upon what is most preponderant? And who is it that preponderates among the different sayings? And is it permissible for someone who is not among the people of ijtihad and tarjih to preponderate for the Muslims? And does the well-versed student call the common folk to his preponderant views?

Acting upon the preponderant (rajih) evidence in jurisprudential matters is obligatory according to the majority of scholars. The act of giving preference (tarjih) is for the mujtahid (independent jurist) or the qualified student of knowledge. As for the common person, they should act upon the opinion of someone among the people of fatwa whose knowledge and religious commitment they trust. They are not obligated to weigh the opinions of different muftis, but rather choose the one whose fatwa they find reassuring. If the imam of the mosque or the preacher is capable of giving preference, he may do so and explain his preference to the people. However, he is not permitted to compel others to adopt his preference. It is also appropriate to mention the differing opinions unless there is a benefit that necessitates limiting the discussion to the preponderant view.