Three features are cited as supporting the standing of the relevant narrations in the two Sahih collections.
1. Their eminence in hadith scholarship: al-Bukhari and Muslim occupy exceptional positions in the field.
2. Their critical ability to distinguish sound reports: both are distinguished for selecting authentic material from other narrations.
3. Scholarly reception of their books with acceptance: the two collections received substantial acceptance among specialists.
The third is especially significant: informed reception may have greater evidential weight than mere multiplicity of routes falling short of tawatur. The argument is not an unconditional assertion about every individual narration without exception.