The key point becomes who this Bobby Kennedy is. Robert Kennedy was changed by 1963. He became deeper, more reflective, and more empathetic -- the aftermath of being broken and having to reforge himself into himself after so deep of a personal tragedy and loss. When you put yourself back together, you're an approximation of yourself but something different, and someone who has taken on a wider dimension. He will be different if his brother had not died. But to make matters more complicated, he is not going to stay static. He will be a different person in an alternate 1969 compared to who he was in 1963 just because people do grow older and develop. Who he would be is not a matter of "we can never know", but it is a matter where to develop that psychological profile would take too much out of me to process through my brain. If we had this discussion in 2010 I could probably do it, but I'm older too.