I asked Bridgewater founder Ray Dalio yesterday if he would want a digital twin of his late mother to talk to. He shook his head: "I don't know how it would affect the grieving process or my memory of her. I just don't know." We had just come off stage at the Fortune Global Forum in Riyadh after a wide-ranging conversation about investing, the global economy and the principals behind how he's building a " Digital Ray."