Malik is hosting a book club meeting and is expecting his friends Priya, Youssef, and Jing to come over. Priya has read the book but found it boring, Youssef has not read the book but has researched its summary because he enjoys spoilers, and Jing has read and enjoyed the book very much. Malik is the only one among them who knows everyone's opinions about the book. During the discussion, Malik receives a phone call and steps out, leaving a note about an unexpected ending in the book for Youssef on the table. Priya, not seeing Malik's note, tells Jing that she thought the book was tedious without disclosing this opinion to Youssef. When Youssef later mentions he knows all about the ending, Jing wonders why he is not surprised. Why does Jing think Youssef is not surprised by the ending, and what does Youssef actually know?

Provide a brief response.
Jing assumes that Youssef is not surprised by the ending because she is unaware of the conversation between Priya and Malik, which indicates that Malik had written a note for Youssef. Jing believes Youssef read the book and thus already knows the ending. She is also unaware that Youssef actually enjoys spoilers and already knows the book's summary without having read it. On the other hand, Youssef's knowledge about the book is limited to the summary and, presumably, the note from Malik which suggests there is an unexpected ending. He does not know that Priya found the book boring and might incorrectly assume that her quietness during the discussion is due to Malik's note about the ending, believing that she is trying to avoid giving away the surprise, rather than revealing her true opinion about the book. Malik, who has stepped out, is the only one who fully understands each person's stance on the book but is not present to clarify these misunderstandings.