(A) College librarians do not have anything about which they can boast.
(B) No student can read more than a thousand books in four years.
(C) It is silly to boast about a library’s size, regardless of whether the library is large or small.
(D) Unused books are a waste of taxpayers’ money.
(E) College libraries are unnecessarily large.
17. Eli:According to many scientists the widespread production and use of chlorofluorocarbons (CFCs)-e.g., to provide coolant for air conditioners-inevitably leads to their escape into the atmosphere where they destroy the vital ozone layer. In my opinion, the continued use of CFCs by humans is like a harmful habit, which, if unchecked, could have disastrous effects on the user, namely self-destruction. The obvious and necessary cure, therefore, is a complete ban on CFC production and use.
Mark: The cure you propose would kill, not save, the user. A ban on CFC production and use would cause the destruction of the air conditioning industry.
The source of Mark, and Eli’s dispute is their lack of agreement on which one of the following terms?