Rhetorical Question

In chapter 10, Vonnegut ends the book with repetition of the same rhetorical question he asked previously. He states: "Birds were talking. One bird said to Billy Pilgrim, 'Poo-tee-weet?'" (275). This question is significant to the story because it explains Vonnegut's theme (stated in the first chapter) that there isn't anything intelligent to say about a massacre. The birds question is meaningless, but Vonnegut believes that anything else said would be just as meaningless.