Please explain your answer.


According to sources who can be expected to know, Dr. Maria Esposito is going to run in the mayoral election. But if Dr. Esposito runs, Jerome Krasman will certainly not run against her. Therefore Dr. Esposito will be the only candidate in the election.

The flawed reasoning in the argument above most closely parallels that in which one of the following?

(A) According to its management, Brown’s Stores will move next year. Without Brown’s being present, no new large store can be attracted to the downtown area. Therefore the downtown area will no longer be viable as a shopping district.

(B) The press release says that the rock group Rollercoaster is playing a concert on Saturday. It won’t be playing on Friday if it plays on Saturday. So Saturday will be the only day this week on which Rollercoaster will perform.

(C) Joshua says the interviewing panel was impressed by Marilyn. But if they were impressed by Marilyn, they probably thought less of Sven. Joshua is probably right, and so Sven will probably not get the job.

(D) An informant says that Rustimann was involved in the bank robbery, If Rustimann was involved, Jones was certainly not involved. Since these two are the only people who could have been involved. Rustimann is the only person the police need to arrest.

(E) The review said that this book is the best one for beginners at programming. If this book is the best, that other one can’t be as good. So this one is the book we should buy.

I will go with B
The logic is If A then not B, hence A
The flaw: Arg assumes only E and J can stand in the election
B has the same flaw; it assumes the rock grp can play only on Friday and Sat.

In D, it is already mentioned that Rustimann and Jones are the only people who could have been involved. Thus, if Rustimann was involved in the robbery he would be the only person the police need to arrest.

In B, it follows the logic If A then not B, hence A