>>18903150If then, thus they would be in a eternal loop where the scientist went back in time to kill Hitler, but then, if Hitler were dead, the scientist would not have went back in time to kill Hitler, therefore Hitler would be alive, because nobody killed him. So, yes, it would be possible, but they would be imprisoned in that loop forever. Or he killed Hitler of another time line and now is in the other time line, basically being a "time fugitive" or baka idk