controls that for the exact same model in the exact same setting you know it does look quite a bit better so bidirectionality makes sense also for sentence comparison tasks like entailment where you have two sentences you're comparing really want them all to be able to compute them and tend back and forth between them and you know look at one and then the other that just seems like correct behavior to do whereas 251 would just go left right and then you'd be done so yeah Burt ended up being kind of the thing after Elmo Elmo