Test for natural language inference.
Premise: "A man reading and autographing a book."
Hypothesis: "The man is the book's author."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Let's solve step-by-step:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
A man autographing a book is not always the book's author. The answer is it is not possible to tell.