This article presents a catalogue of some of the ways in which Proust's novel fails to make sense. The major categories of non-sense examined here are: minor inconsistencies due to the unfinished quality of the work; chronological incoherences; and inconsistent distinctions between narrator and author, with particular attention to textual entailments of the differences between the author and his semi-autobiographical narrator in terms of homosexuality, Jewishness and snobbery.