Suppose The Martian is a science fiction novel written by Andy Weir that follows astronaut Mark Watney as he is stranded on Mars after his crew mistakenly believes he has died in a dust storm. Watney must use his ingenuity and wit to survive on the hostile planet until a rescue mission can be mounted.
Can we infer that "The Martian is a non-fiction memoir written by a real astronaut"? Yes, no, or maybe?