In the end of a debate, I just tell people, go to the Lord, pray with all your might and heart, pray for understanding when you are truly ready to accept the truth from God's word that you may find you were wrong all along, and then get into the word and don't stop till you know you would die if a gun was put to your head to deny if this was the truth or not.
The Lord said, Seek and you shall find. I went to seek, I came to him for truth and he showed it to me. he will do the same for you. If simply someone who knows his word in certain areas cannot convince you of truth, then you and the Lord should get together and he will make it clear. Of course, if your heart is truly hardened and not open to change, then he will probably just let you believe the lies you want to keep believing.
Take the Lord's word for it, not mine.
1 Corinthians 14:14, "If I pray in an unknown tongue, my spirit prays, but my understanding is unfruitful."
Again, what would you make of this? If you sound convincing, maybe I will explain it my own way to you if this verse agrees with the verses you gave me