fideistic

/ˌfaɪdiˈɪstɪk/
adjective
  1. Relating to or characterized by the belief that faith is the primary basis for knowledge, especially in religion, rather than reason or evidence.
    • The book explores fideistic traditions in medieval philosophy.
    • His fideistic approach to theology rejects any need for scientific proof.
    • She found the fideistic argument unconvincing because it ignored logic.