here is implicitly making the task for the later classifier harder by pushing apart samples that should be of the same class and so this is this is not happening if you introduce a labels to the pre training objective that's what they do the supervised contrast objective now you still all you want to do is here we're going to draw the same embedding space and we're going to draw this original dog image and we're going to draw the Augmented version of the original dog image but now we also have the following we also have these images