A system or practice that emphasizes doctrines and adheres strictly to established principles and teachings.
From doctrinal (doctrine + -al) + -ism (Greek -ismos 'practice or system'). This is a more formal philosophical term than doctrinairism, often used in academic discourse.
Doctrinalism in academic and religious communities can be either a feature (maintaining consistent principles) or a bug (resisting new evidence)—whether it's good or bad depends entirely on context and whether truth-seeking matters.
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