Farhadi,V , and Zahedi,M . "Explanation and examination of the necessity of obtaining certitude or the sufficiency of suspicion in belief, according to basics of theological belief Imamiyyah, Mu'tazilah, Ash'ari and Matridiyyah schools" .e625 , Theology Studies, 4, 7, 2025, e625. doi: 10.22034/kalam.2025.689.1058