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#25 - Most serious students are happy students, and most

JKing
LSAT Apprentice
 
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October 2003 LR section 3 # 25

SSmostHS
SSmostGS
GS-->OW

SSmostGS-->OW

SSsomeOW

I picked B. Is it SSmostHS-->GS-->OW??

A) incorrect reversal?
Jon Denning
PowerScore Staff
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Hey J - thanks for the question. The shorthand method you've used to ask this makes it a little tricky to figure out exactly what you're asking (and what gave you trouble), but I'll do my best with it.

Your initial three diagrams look correct, however I'm not sure what the two lines below those first three diagrams are meant to be...? Inferences?

In any case, there are a few inferences that can be made here, based on some rules of formal logic:

1. SS --most--> OW
2. GS <-some-> H
3. OW <-some-> H [this is answer choice B]

Answer choice A isn't a reversal per se, but rather just too strong (most) for what we know (only some). That is, we can know that since the majority of SS is both GS and H, that some H are GS (and vice versa). And if H <-some-> GS --> OW, then H <-some-> OW, which is the correct answer. But we can only get to some, not most. Note too that if A were thought to be the right answer, it would also make B correct, so A can be dismissed immediately for that reason as well.

I hope that clears things up!
Jon Denning
PowerScore Test Preparation

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