 We cannot hope to do justice to this complex paper here. However, focussing on the theme of inconsistency, one question that could be asked is how much these mechanisms, perceptual completion and object persistence, are really different, as against being species of the same genus. It would seem that the illusion is pervasive because of the mechanism of identification of earlier/later stages. But this is what we saw was sufficient for contradiction. If these models of motion perception are right, it follows that contradiction is pervasive in our experience as the phenomenology of change, which is to say, everywhere.