So you honestly believe that the Supreme Court was incapable of making an impartial decision in this matter? A court heavy on Northern judges would automatically rule against the legality of secession while a court heavy on southern judges would automatically rule for it. I'm not sure how to refute 'irrefutable logic' like that. If you want to consider Texas v White to be hopelessly biased then that's your right. It still doesn't change the fact that it was a valid decision and remains one until a future court modifies the decision or until the Constitution is amended. Until that time secession as practiced by the southern states is illegal. That's irrefutable.