Opinions - Subjects, practices, and interpretations, where Christians have widely diverging ideas, and the Holy Scripture is either complex, or not as definitive or clear, or where there are different scriptures that seem to support different aspects of a belief. Where God is silent or enigmatic, Christians should not be dogmatic. Prophecy is a prime example. Cultural application of the Christian life, or specifics of personal sins can be others. Generally, but not always, these areas can be narrowed by further study and application of scripture, but cannot be unequivocally defined. With Opinions, we can have mature tolerance with lively and even enjoyable discussion. The 'strong' don't offend the 'weak' in faith.  Here also, as with 'Convictions', many Christians have separated from each others fellowship over "doubtful disputations", much to the hurt of the church and our impact on the world.