Luke, the logical conclusion to Calvinism is hyper-Calvinism. What is the need to pray for a lost friend of family member? What is the need to continue to carry out the Great Commission? What is the need to invite someone to your church? After all, God has chosen who will be saved and not saved. The elect ultimately have no choice as to their disposition. Certainly, this is not the way most Calvinist believe and it is insulting to them to even suggest this. So what makes it right for you to accuse Winman of "open theism" when you know that is not the way he believes. In short, it appears you have accused him of heresy. Talk about the pot calling the kettle black.