Why is that the real question? And who gets to decide if they are contrary?
"Why is that the real question?"
This is the real question because true religion is all about relationsip with God, and the Bible is the Word of God and none can claim right relationship with God and knowingly remain contrary to Him.
"And who gets to decide if they are contrary?"
Ultimately, God decides and we have to discover His opinion, which leads to this most difficult question: "How do we reliably discover God's opinion?"
The heart of God is expressed in His Word, the Bible, and by reading it we may know His opinion.
We may, by prayer ask His opinion.
We may take the counsel of other Men of faith, men of God, men of God's Word whose lives evidence the fruit of the Spirit; men such as this ought to know God's mind, and we can receive it from them.
In all things, however, we must back-check everything against the Bible to verify whether a given determination is trustworthy.