October 2015 LSAT Section 4 Question 22

On Wednesdays, Kate usually buys some guava juice. But the only place she can buy guava juice is the local health foo...

Alan on April 17 at 02:01AM

Difference between A and C

I do not understand the differences between A and C, and why A is correct and C is not. Could this be further explained please?

Emil on April 21 at 01:23AM

Hi Alannadels,

For parallel reasoning questions, I like to "anonymize" the stimulus. We can do this as follows.

Most Y are X
If Y - Z
Thus at least one X and Z

Answer choice A could be diagrammed as follows.

If UC -> T
Most D are UC
Thus some D UC

Although the order of the first two statements are flipped, the overall logic is exactly the same.

C can be diagrammed as

Most D are UC
If UC - T
Thus If D - T

The conclusion here is entirely different, this is an absolute, while the stimulus was only a some.