1- The answer to the question of a sunni anchor was given in detail by a Shia scholar. The speech can be listen in Urdu at the link given below: https://audiomack.com/truth-is-religion/song/best-answer-on-occultation-of-imam-mahdi The answer includes the concept of ghayba/ occultation in the light of history of the prophets. 2.   The English translation of the speech mentioning the answer can be read as given below for complete explanation of the concept of ghayba/ occultation: