(Pro 26:5 KJV) Answer a fool according to his folly, lest he be wise in his own conceit.
One difficulty I have applying this verse is the matter of judgement. Who am I to determine if the person speaking is a fool? Actually, there is no one better. I would hope that you would fit into that category too. A foolish man is the opposite of a wise man. A foolish man is the opposite of an insightful man. Both wisdom and understanding begin in a fear of the Lord. We have a ready made screen for identifying a fool.
We may not be able to know the mind of heart of a person. We can observe their position on issues based on morality. This is getting easier in many ways because our culture, which has paid lip service to God’s standards in the past, is taking increasingly more blatant stands in opposition to Biblical ethics.
So? To know what the Bible’s standards are you need to read the Bible. It is getting more iffy to accept anyone else’s word for it because more and more pastors and teachers are falling in line with Satan and our culture. Don’t join the fools.