network so we can learn it all and when and now one question that has often come up in this in this context as well she we ever do pixel level video prediction that's a good question I mean awfully you're just looking at noise and what's the point in trying to predict that what really matters is predicting the things that effect so how do you do that more directly so we're going to use plan ability as a criterion for representation learning now so validation that works as I just described go into a little more detail