The first two conditions concern the narrators:
• Every narrator is ʿādil (عادل), trustworthy and reliable.
• Every narrator is tāmm al-ḍabṭ (تام الضبط), remembering or writing the Hadith very carefully with its sanad.
We will now study the remaining conditions concerning a connected sanad, a hidden defect, and contradiction of a more reliable narrator's report.