So lets say you go back in time and give Einstein a book on the theory of relativity years before he comes up with it. In that case, who discovered relativity?
He still did. I just took a shortcut by giving him the answers before he discovers them on his own. Which means that the time he would have originally used to come up with the relativity theory would be then used for something else… A time machine maybe? Hence that’s how I got back in time ;)
