doctrinaire

/ˌdɑktrəˈnɛr/
adjective
  1. Strictly following a theory or doctrine without considering practical realities; dogmatic.
    • She was criticized for her doctrinaire refusal to compromise on the policy.
    • His doctrinaire approach to education ignored the needs of individual students.
    • The party's doctrinaire stance on taxes alienated many moderate voters.
noun
  1. A person who rigidly adheres to a theory or doctrine, regardless of practical considerations.
    • The committee was dominated by doctrinaires who rejected any new ideas.
    • The debate pitted pragmatists against doctrinaires from the same party.
    • He was a doctrinaire who insisted on following the textbook exactly.
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