Rorty furthers his distinction between public and private by classifying books into those "which help us become autonomous" and those "which help us become less cruel", and roughly dividing the latter group into "books which help us see the effects of social practices and institutions on others" and "those which help us see the effects of our private idiosyncrasies on others." He dismisses the moral-aesthetic contrast, instead proposing the separation of books which offer relaxation from books which supply novel stimuli to action. Metaphysicians, having little doubt about their final vocabularies, confuse private projects with the pleasure of relaxation, and hence dismiss, as not serious or merely aesthetic, not only those writers with no relevance to liberal hope, like Nietzsche and Derrida, but also those warning against the potential for cruelty inherent in the quest for autonomy, among which Rorty places Nabokov and Orwell, since "both of them dramatize the tension between private irony and liberal hope."