Where does the main logical pressure of the three-brothers dilemma arise?

Salvation of Children: Aṣlaḥ, Recompense and Theological Differences

• Treating the youngest brother’s early death as the result of his own preference
• Applying a universal obligation to one case but not a parallel case
• Equating all children with the obedient brother without evidence
• Denying the difference in deeds between the two older brothers