As-salâmu 'alaykum. Could you provide us with an introduction to the science of Hadīth? Jazâk-Allāhu khayran.
Alaikumassalam wa rahmatullah,
Iyyana wa iyyakum. The science of hadith is complex and unfortunately I cannot explain it in an answer or even essay. I recommend that you check out the books I mentioned in this previous answer.
And God knows best.
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