I say, and with God's help: It is not correct; because the endorsement of ijtihad (juridical reasoning) is not invalidated by a similar ijtihad except in the case of the qibla (direction of prayer); because it can be subject to a change in direction through ijtihad, as it is a religious matter, while impurity is a tangible matter that cannot be made pure through ijtihad due to the necessity of repeating the prayer when impurity appears after ijtihad in clothing and utensils. Therefore, whenever we consider a garment pure through ijtihad out of necessity, it is not permissible to consider it impure through a similar ijtihad, as this would invalidate every prayer performed with what was initially considered impure, while it would be valid with what was considered pure. See: Maraqi al-Falah, pp. 34-35, and God knows best.