Self-study
Library policy: Support For a book to be removed from circulation, the book must be badly damaged and must not have been checked out for over two years. █████ ████ ███ ██████ ███████ ██ █████ ███████ ██ ███ ██████████ ██ ██ ██ ████████████ ██ █████ ███████ ███ ████ ██ ███████ ████ ███████████ ██ ████ ████ ███ ████ ███████ ███ ███ ████ █████ ██████
████████████ █████ ███████ ██████ ███ ██ ███████ ████ ████████████
Summary
The conclusion is that Paper Flowers should not be removed. This is based on the following rules:
In order for a book to be removed, it must be (1) badly damaged, AND (2) not been checked out for over 2 years.
If a book is written by a local author OR considered significant to local history, then this additional rule applies:
In order for the book to be removed, it must not have been check out for over 3 years.
Missing Connection
We want to prove that Paper Flowers should not be removed. So we want to show (1) it was not badly damaged, OR (2) it has been checked out within 2 years.
If the book is written by a local author OR considered significant to local history, then we want to show (1) it was not badly damaged, OR (2) it has been check out within 3 years.
7.
Which one of the following, ██ █████ █████ █████████ ███ █████ ███████████ ██ ███ ███████ ███████
a
Paper Flowers is █████ ████████
(A) tells us that Paper Flowers satisfies one of the necessary conditions for being removed. That doesn’t establish that Paper Flowers should be removed.
b
Paper Flowers has ████ ███████ ███ ██████ ███ ████ █████
(B) establishes that we do not meet one of the necessary conditions for being removed. Regardless of whether the book is significant to local history or by a local author, if the book has been checked out in the last year, then it hasn’t met the condition of “not been checked out for over 2 years” or “not been checked out for over 3 years.” So it shouldn’t be removed.
c
Paper Flowers was ████ ███████ ███ ███████ ███ ███ █████ █████ ████
(C) isn’t enough to prove Paper Flowers should be removed if the book isn’t by a local author and isn’t important to local history. That’s because if it is by a local author/important to local history, it just needs to be checked out within the last 3 years to be removed.
d
Paper Flowers was ███████ ██ █ █████ ███████
(D) doesn’t tell us whether the book is badly damaged or hasn’t been checked out in the last 3 years. So we don’t know whether any of the necessary conditions for removal haven’t been met.
e
Paper Flowers was ███ ███████ ██ █ █████ ███████ ███ ██ ██████████ ██ ██ ██ ████████████ ██ █████ ████████
(E) doesn’t tell us whether the book is badly damaged or hasn’t been checked out in the last 3 years. So we don’t know whether any of the necessary conditions for removal haven’t been met.