Text: Of these, or the many other similar examples I've collected, there is no mention in the book . The reason that I didn't mention them was that to do so seemed to me a cheap shot--concentrating on the ephemeral and the inconsequential--the scummy froth atop the waves of any discourse.
Entailment: The book is not mentioned in any of these or those similar to these.
Contradiction: I did choose to mention them, however.