We're Talking Pamphlet Material Here

Customer: Do you have a book about putting cedar behind a bathtub?
Me: Well we have a number of books about bathroom renovations and ideas. One of them might have something about that in them.
Customer: I'm looking for a book just about putting cedar around the tub.
Me: We don't have a whole book just about putting cedar around your tub. They might have a pamphlet about cedar at the building stores in town....

Why do people argue these things?

Customer: Why do you have this in the fiction section?
Me: Because it's fiction?
Customer: This is a true story. I saw it on the news. It should be in true crime.
Me: Ummm, I'm sorry sir, this is definitely a work of fiction.

I open up the front cover and show him on the copyright page where it clearly lists it as fiction

Me: It's a mystery about a murder case during WW2 where a man is falsely accused. But it's not a real case, it's made up.
Customer: I'm sure I saw this on t.v. - it's a real story and you should put it the crime section.