Antichrist cannot find a way against the Ilm al-Ladun [Hidden-Innate Knowledge]. That is to say the hidden knowledge would melt it down, just like salt melting in water. That is because the antichrist gives a struggle with superficial knowledge so it cannot stand against Hidden Knowledge. Hazrat Mahdi (pbuh) is given the Hidden Knowledge. The superficial knowledge of the antichrist will be annihilated with the Hidden Knowledge of Hazrat Mahdi (pbuh). That is why Hazrat Mahdi opens all the doors and windows of the dajjal (antichrist) and enters its secret bastions. Hazrat Mahdi (pbuh) enters even those outlets that are believed to be out of bounds. - Harun Yahya