should we keep a buffer should we order them there is this task of hard negative mining where you say Oh any old negative won't do it's actually better if we take negatives that are you know just hard enough there is a curricular curriculum learning problems and so on so it would be best to actually just get rid of these negative things so that's why we want to get rid of them so that's the approach byl bootstrap your own latent there is the input image we take one image at a time and you apply two different random augmentations to it