Yep, often we have already made up our minds on doctrine before putting them up for discussion. If that is how you think the Christian life should be lived by, I respect that choice.
Anone coming in to discuss any subject in the Gospel is already convinced of it, unless he or she has not accepted the sacrifice, Jesus Christ.
It is not a matter of having one's mind "made up," it is a mater of sharing the Word.. If someone you read is wrong, eventually the Teacher will fix all. God bless you always...