(Church leaders) may safeguard a purity of doctrine.Logical formLearned from4 sentences. Persons may change a doctrine.Logical formLearned from4 sentences. A doctrine may apply to teaching.Logical formLearned from4 sentences. Doctrines may pertain-to a catholic church.Logical formLearned from4 sentences. A development of a doctrine can be a weight.Logical formLearned from4 sentences. Thoughts may sum_up in a doctrine.Logical formLearned from4 sentences. A shift can be in military doctrine.Logical formLearned from4 sentences. The world may unveil a (security doctrine).Logical formLearned from4 sentences. A doctrine can be on homosexuality.Logical formLearned from4 sentences. A doctrine may be dealt.Logical formLearned from4 sentences. A doctrine of humanitarian intervention may proclaim during a crisis.Logical formLearned from4 sentences. A religion may adjust doctrines.Logical formLearned from4 sentences. A doctrine may affirm that something-is-the-case.Logical formLearned from4 sentences. A doctrine can be outdated.Logical formLearned from4 sentences. Sub-clauses may pertain-to a doctrine.Logical formLearned from4 sentences.