A person who believes in the doctrine of infallibility, especially regarding religious or authoritative matters.

त्रुटिहीनतावादी

English Usage: The infallibilist argued that the leader's decisions could never be wrong due to his divine guidance.

Hindi Usage: त्रुटिहीनतावादी ने तर्क किया कि नेता के निर्णय कभी गलत नहीं हो सकते क्योंकि उन्हें दिव्य मार्गदर्शन प्राप्त है।