may be that we have more on labelled data and unlabeled data is pretty cheap to obtain so that's the advantages and disadvantages here so this new loss so they they do compare this here and usually in these contrastive objectives you have somewhat like two encoders want to encode the the anchor and want to encode the Augmented versions and this one is like a momentum with shared weights and so on it all of this isn't really important if you want to look into that look into papers like momentum contrast or I did one on curl for