Peace -- the site is full of errors and contradictions which were parroted from long ago.
Using al-awl or algebra to normalize or increase/decrease evenly all shares to new values that are never mentioned in Qur'an can be used to wrongly "fix" surplus/shortfall any combinations.
Case which supposedly occurred during caliphate of Umar ibn Khattab.
A woman left husband, mother, 2 uterine brothers & 2 full brothers.
Umar initially gave 1/2 husband + 1/6 mother + 1/3 two uterine brothers which left nothing to the two full brothers.
The two full brothers argued that even if their father was a donkey or a stone cast into the sea and they had no paternal relationship, they still had the same and equal relationship with the deceased as the uterine brothers through the same mother.
Umar reconsidered allowed the two full brothers to inherit equally with uterine brothers the 1/3.
Please ask ulamaa' explain husband, mother, 2 uterine sisters, 2 full sisters & 2 full brothers?
Please state which verses you are using for all cases above and where Qur'an differentiates full and uterine siblings?
Nope, no contradictions. You are only saying that because you reject Hadith, which are HALF of Islam.
The case which you've brought up is quite interesting. This is actually one of the few instances in inheritance law where there is disagreement among the scholars.
The Shafi'i scholars accept the ruling of 'umar.
According to the Hanafi madhab, however, the two full brothers will simply not inherit.
There is consensus of the 'ulamaa that verse 4176 refers to full and consanguine siblings, while 412 refers to uterine siblings. This si mentioned in the books of tafseer. Of course, you guys wouldn't understand this because you only go by the Qur'an.
'Awl has been proves through narrations where umar applied it. Even if you dont accept that, its been proven through qiyaas (analogy) for when the shares of creditors is proportionally decreased when the assets care not enough to pay them all off. Agian, these are narrations, NOT in the Qur'an, so you guys will obviously dismiss them all. Even though the Qur'an tells us to follow the example of Rasulullah (sallAllaahu alayhi wasallama) MANY TIMES and he (sallallaahu `alayhi wasallam) tells us to follow his sahaabah.
Now since you claim you don't need ahadeeth or narrations from the sahaabah, here is a question for you.
What happens when only a spouse is inheriting? Where does the residue go?
May Allah guide you all. Ameen.