@
Mohamed Saif,
First, I should make clear that I'm not rejecting any Hadith, just asserting that different people have different thresholds of certainty. One group of Muslims can be completely fine with
Akhbar-e-Ahad, while a second group cannot. And then there would be a third group in the middle: usually being fine with
Akhbar-e-Ahad, unless they are related to extremely important matters such as capital punishments, in which case they would subscribe to the concept of no punishment in the presence of reasonable doubt, and
Akhbar-e-Ahad would definitely figure as reasonable doubt for them.
As far as I've understood, on the matter of the Hadith being used as a source of Shariah, there are three important interpretations.
One is the complete and absolute belief in
all Hadith literature. Even going to the extent of believing an activity not performed during the Prophet's time is also prohibited. For example, since birthdays were not celebrated by the Prophet's companions, therefore such an activity
must be prohibited. From what I've seen, such interpretation is followed by the majority of lay/common Muslims. This is something, not even conservative scholars subscribe to since there are more than a few Hadith that contradict each other, or are known to be fabricated but still managed to get recorded in the Saheeh Hadith books. This interpretation is significant not because of theological evidence in support of it, but because of the large number of Muslims who believe in it.
Second is the belief that all Hadith are by-default part of God's everlasting Shariah unless there is some additional evidence that would put the Hadith in doubt. Suspicions, such as one Hadith being contradicted by a more historically reliable Hadith, or by some Qur'an verse etc. Most conservative scholars would subscribe to this interpretation.
In contradiction, the third group, practically speaking, follows the idea that Hadith are by-default
not part of everlasting Shariah. They argue that since Prophet Muhammad was given the responsibility to spread the religion far and wide, to spread God's divine Shariah, its obligations and prohibitions to all the people of the world until the Day of Judgement, he
must have fulfilled this obligation in as public a manner as possible. He must have mentioned such theological knowledge to as many people as possible, as has happened with the Qur'an and a smaller portion of the Hadith, the
Muttawatar Ahadith. Rest of the scripture i.e. the
Akhbar-e-Ahad, where the Prophet is found addressing only a few individuals were his personal opinions or recommendations in his capacity as the judge, leader, father, husband, elder etc. of his people. The Imam Muslim reported
date palm grafting hadith is significant in this regard.
Akhbar-e-Ahad can be considered as part of divine Shariah only when they go along with the Qur'an - hadith cannot abrogate the Qur'an. When such appears to be happening, then that particular hadith is either historically unreliable or has its meaning misunderstood.
So how do we come to a proper conclusion? Should Apostates be killed or not or should adulterers be stoned or not? How are we supposed to implement the Shariah if we cant come to a certain conclusion?
Conclusions can be drawn in the same way they have been drawn for centuries. Going through all the evidence and deciding for oneself, which interpretation holds more water. In a lot of cases, which conclusion is right and which is incorrect is not as important as having sincere intentions and making sincere efforts to find the right path, no matter what that path may be.
A Muslim
can become a scholar to be at the best position to come to the right conclusion, but since for general lay Muslims such is usually impractical, the easier method is to go through the brief evidence put forth by the eminent scholars of each interpretation.
Regarding which interpretation should be implemented, the
Qur'an 42:38 concept of: اَمْرُهُم شُوْرٰی بَينَهُمْ (Muslims, who settle their affairs with mutual consultation) is the practical method which has been agreed upon by conservative scholars for centuries.
However, unlike the current status quo, a good argument can be made for common Muslims to also become a part of this consultation by educating themselves on the limited related matter, instead of blindly accepting and believing in error prone humans.