four right here you simply say well here is a vector here is a vector here is a vector and here is also a vector now model you're already learning like all the ways to make this thing here happen and you're already learning your output weights up here right using back propagation why don't you learn yourself what you would like for position one like what kind of information you would like to be to have there using back propagation right so the model you provide them you always provide the same vector so this is the same vector