If Umar (rta) Can Extract Hukm From Khabr-e-wahid (Hadith), Why Can't We?
Ghamidi saheb accepts hadith when it complies with the Qur’an. He says that Hadith is not an independent source of Deen. It contains the explanation and applications of Deen.
The share of the grandmother is not mentioned in the Quran, but it can be deduced from the Quran. The companions, when they had a precedent from the prophet, it made things for them easy and authentic. The same is the practice we find in courts. First, they look for a precedent; when they do not find it, then they interpret a law. However, academically, we establish a relation between the practice of the Prophet and the Quran. This academic approach is well established later by the Usuliyeen. The companions did not have to establish this relation every time. They just followed whatever they receive from the prophet. Yet, they sometimes try to understand the nature of this practice, whether it is based on the Quran or a part of Sharia or not, etc.