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Arian
Discriminate from Aryan
Don't confuse 'Arian' with 'Aryan', which refers to a different ethnicity and historical context. 
Christian History
Understanding the Christian historical context, specifically the Council of Nicaea, will clarify Arian beliefs. 
Historical Usage
Realize that 'Arian' is not a common term today; it's primarily used in historical or theological discourse. 