question #3 Sahih Muslim 1178c, Book 15, Hadith 6 : What role do different narrators play in the transmission of hadiths?

This hadith has been narrated on the authority of ‘Amr b. Dinar with the same chain of transmitters, but none of them (the narrators) made a mention that he (the Holy Prophet) was delivering address at ‘Arafat except Shu’ba.