way we can make these representations contain a lot of semantic information because what we want to do with the augmentation is basically we want to destroy all the non segmenting information sorry non semantic information and random cropping is one of those methods horizontal flipping is one of those methods because we say well whether an image goes left to right or right left most of the time the semantics are the same the pixels are different but the semantics are the same so by putting an augmentation in there