Question

you are taking the final exam in your logic class. There's a multiple choice question that, for whatever reason is missing but you have the answers-only one choice is correct. Here they are:

a. Answer A

b. Answer A or Answer B

c. Answer B or Answer C

Which is correct and why?

Answer 1

Answer 2

 Answer:

The correct choice is  

                                   c. Answer B or Answer C.

Why?

• If a were correct, then b would also be true (contradiction).

• If b were correct, then c would also be true (contradiction).

• Only c can be correct without forcing another answer to be true (specifically, if C is the true answer).

• 
  

So, c is the only logically consistent option.