classification head with two outputs and then only train this classification head and that is won't perform as well but it gives you sort of a better idea of how good is the representation that this network right here learned and on top of that so if you spin this idea further you can actually go and do this at any intermediate layer right here so you can forward propagate until layer two right here and then here you add your classification head into the two into the two classes and you only train the classification head that being said you