Louise discovers how to see the future without input from the other 11 sites . This is like each site have 112 the plans for a time travel spaceship to force everyone to work together , but Louise manages to build one herself . It destroys the whole humans need to work together narrative . So basically the whole movie . Also , if time doesn ' t exist and there is no future , you can ' t change the future , so Ian divorcing Louise over something he knows can ' t be changed makes no sense . <| sep |> if you don ' t have anything to hide what ' s the harm ? kind of thing . Frankly , I ' d find something hideously embarrassing about him , and post it . Or better yet , bring it up to the family at christmas . That ' s probably terrible advice , but sometimes you fight fire with fire .