Undependable?

[Terrance]

Now Joyce hit upon the more radical device of the undependable narrator
with a style adjusted to him. He used this in several episodes of
Ulysses, for example in Cyclops, where the narrator is so obviously
hostile to Bloom as to stir up sympathy for him, in Nausicaa, where the
narrator's gushiness is interrupted and counteracted by Bloom's
matter-of-fact reporting, and in Eumaeus, where the narrator writes in a
style that is constabular. The variety of these devices made T.S. Eliot
speak of the ‘anti-style’ of Ulysses, but Joyce does not seem to oppose
style so much as withdraw it to a deeper level.

Richard Ellmann, James Joyce (NY, 1959), p. 367

Note that to be undependable in this sense is not identical with being
what I have called unreliable; most unreliable narrators are dependable
in the sense of being consistent. 

Wayne C. Booth, The Rhetoric of Fiction 2nd Edition University of
Chicago, 1961 p. 300

This is in discussed Part III "Impersonal Narration" where Booth takes
up the uses of authorial silence. 

"exit author" once again