Deeksharathore
I was confused between B & C. Why not C?
Hi Deeksha
Here, we are asked to replicate the structure of the argument made in the stimulus. Therefore, it becomes imperative to understand the structure of the stimulus. For such questions, I find it useful to allocate variables to the various parts of the argument to get a clear picture.
Shakespeare was the world's greatest playwright (X) --> he must have written the world's greatest plays (Y)
The fact that he wrote the greatest plays in the world (Y) --> only goes to prove that he is the world's greatest playwright (X)
So essentially the argument is following a circular logic, with the conclusion of the first argument (Y) acting as the premise of the second and vice versa. Let us examine option (B).
B. A miscarriage of justice occurs when an innocent person is sent to prison. However, there are no miscarriages of justice because people in prison are guilty. Otherwise they would not have been sent to prison.The first statement sets the standard for what follows. On examining the subsequent statements:
Person is in prison (X) --> Guilty (Y)
Now, we know that if X --> Y, then Not (Y) --> Not (X). This is exactly what happens in the last statement.
Not guilty (Not Y) --> Not sent to prison (Not X)
As we can see, what is used as a conclusion in the first statement is used (in its negated form) as a premise in the second statement, and vice versa, which perfectly replicates the structure of the stimulus. Thus (B) is the correct answer.
Option (C) does not follow this circular structure.
C. The presence of enlarged white corpuscles in the blood would indicate that the patient must be suffering from disease X. However, his blood sample contains no enlarged white corpuscles, so he cannot be suffering from disease X.Enlarged white blood corpuscles (X) --> Disease X (Y)
No enlarged white blood corpuscles (Not X) --> No disease X (Not Y)
The premise in the first statement (in negated form) continues to be the premise in the second statement and the same holds true for the conclusion as well. Hence this is not the correct answer.
Hope this helps.