by tommywallach Sat Nov 24, 2012 10:46 pm
Hey Randitect,
Well, the answer is (E), so I can't tell if you know that and are still confused, or if you got it right, but you don't understand why.
So this is a match the reasoning question. In order to do this, you have to focus on the CORE--how the premises support the conclusion, then match it. Let's start with the prompt.
All X, Except XX, are Y. All Z are X.
Guy #1 is not an XX, but he is Z. So he is Y.
You'll notice I've removed all the actual content, so we can just look at cleanly. This may seem ridiculous at first, but it's the best way to think of these. Now, let's match that logic.
(A) All X, except XX, are Y. All X are Z. Nope it's already wrong. See how it switched the X and the Z?
(B) All X, except XX, are Y. All X are Z. Same error!
(C) All X, except XX, are Y. All Z are X. Then some really random weirdness.
(D) All X, except XX, are Y. None of the...Nope! We can't suddenly throw in a "none of the" when the original didn't have that.
(E) All X, except XX, are Y. All Z are X.
Thing #1 is not XX, and it is Z. So it is Y
Perfecto! Don't be afraid to knock something out as soon as it introduces something you didn't have in the original argument!
-t