Is it possible that all the Sahabah were ignorant of an issue related to the Qur'an?

Q 4: Is it possible that all the Sahabah (Companions of the Prophet) were ignorant of an issue related to the Qur'an, or a word mentioned therein? (Part No. 3; Page No. 401

A: It is impossible that all the Sahabah were ignorant of an issue in the Qur'an related to Shari`ah or were wrong about it, as this contradicts the texts of the Qur'an and the Sunnah which indicate the infallibility of the Ummah (community) in their Ijma' (consensus).However, some of them may have been unaware of one of the rulings of the Qur'an or may have committed a mistake about it and told it to others. As for their Ijma' on an error, this is impossible.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.