In the light of the previous discussion, we come to the conclusion that `i¥mah is not solely cognitive or pragmatic, for the Prophets and the Imams, being godly, are infallible both in knowledge and deeds. For this reason, their knowledge and act are a proof until the Judgment Day for the people of all ranks.
source : AHL AL-BAYT THE CELESTIAL BEINGS ON THE EARTH Allameh Hussein Ansariyan