models that also do the other direction where here they say okay the probability of a sentence is a product and each word is predicted from the words after it but it kind of is the same problem you only ever have access into the one direction basically however you define the order of decoding you only ever have access from a given word to what was before it in the order so the main idea of excel net is they say hey why don't we consider all possible orderings right I mean that that's kind of a that's it's an idea so let's go back to our thing