A. Call Strawman! B. Claim that it is a Great Mystery. And Who are you, oh man, to answer back to God? C. End the discussion with a speech about Christian love and charity. Affirm respect for the other party. D. Claim that you were predestined to disagree with Calvinism! And who are THEY to answer to answer to God?!? E. Go off to study some more greek.
I will probably do letter C. I would like to state details about Christianity and love because a lot of people usually get affected by this. There are even some who may reflect whenever religion is mentioned. I will not be disrespectful towards the other party because I want to let them know that I respect their opinion the same way that I expect them to respect my own opinion about the matter.
There are some people who would probably use a bit of guilt as the last straw to possibly win but this does not always work. I would rather do letter C as this is the truest one to my personality.
End the discussion with speech about christian love and charity. Affirm respect for the other party. Claim that you were "predestined" to disagree with calvinism! And who are THEY to answer to answer to God?!?