The recent concert was probably not properly promoted. Wells, who is quite knowledgeable about the concert business, ...

on October 10 at 01:06AM

Why not A

After diagramming A & C, I’m having a hard time seeing how they are different. Don’t the premises in each invoke the contrapositive to arrive at the conclusion?

2 Replies

Irina on October 10 at 04:35AM

@hannahnaylor5,

The issue with (A) is that the condition in the premise is different from the one in the conclusion -"performed by a highly skilled surgeon" is not the same as "properly performed." In fact, it is possible that both of these conditions are true - the surgery has been improperly performed by a highly skilled surgeon. The bottom line is since (A) conclusion is unsupported by the premises, we can conclude that the reasoning is different from the stimulus.

on October 11 at 12:45AM

Oh okay, I see that now. Thank you!