Sources Of Islam
There are only two sources of religion: The Qur’an and the Sunnah ( the perpetual unanimous religious practices, transmitted from generations to generations, like prayers, fast, hajj etc). The rest is history of the Muslims knowledge and Islamic sciences, which is created and transferred by the individuals. Therefore, this knowledge contains human error and unauthentic reports. It is an integral part of of this quest to know how to differentiate between authentic and unauthentic. The scholars have already done this job. At some occasions their research may differ from each other. Here one has to choose between their opinions or do his own research. This is how knowledge is acquired.