Let's say you have the ability to see into the future. 

And let's say you see a writing on the wall. 

Will you be able to see it if the writer did not first think up and write on the wall?

And what if the writer decided not to write on the wall, will you still be able to see any writings?

What if you decided to interfere with the writer and distorted the writings, so it will be your words on the wall.  

Who's words will you be reading yours or the writer's?  

What will you be able to learn about the writer's ideas if the words are no longer the writer's, but yours?