Q 2:
Was the Prophet (peace be upon him) liable to forgetfulness?
A:
Yes, the Prophet (peace be upon him) was liable to forgetfulness. However, Allah (Exalted be He) alerted him when the matter was related to the Shari`ah. It was narrated in the Two Sahih (authentic) Books of Hadith (i.e. Al-Bukhari and Muslim) on the authority of
Ibn Mas`ud (may Allah be pleased with him) who reported Allah's Messenger as saying,
I am a human being like you and liable to forget like you, so if I forget remind me.
When he unintentionally missed some of the acts of `Asr Prayer.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.