Neither can easily be proven, but dualism has too many problems that goes against my word view. If mind and materialistic world are separate, then what is mechanism between them. Mind controls the body but cant affect other material, does not seem reasonable. I find it much easier to believe that mind somehow emerges from complexity of physical brain. Still, I don't understand the need to pick sides here. I don't know which is true, so I try to stay unbiased, before I collect more knowledge.