somebody tells you I have a universal data compression already compress everything no problem here's a prove that this is actually not possible to prove it another way also another way to prove it is to do it by Counting you can say okay suppose your algorithm can compress all thousand histories ok how many thousand bit strings are there we throw the one thousand possible bit strings now if we can compress all them that means we can pick every one of them and turn them into something smaller and distinct smaller otherwise we cannot get the