## LGB 2017 edition pg. 321: C<-/->G

Stephanie Turaj
PowerScore Staff

Posts: 244
Joined: Mon Jan 11, 2016 11:02 am
Points: 313

We recently received the following question from a student. An instructor will respond below. Thanks!

Hello! On page 321 I would like to know how the first inference can be combined with the super rule to create C<-/->G
Jonathan Evans
PowerScore Staff

Posts: 681
Joined: Thu Jun 09, 2016 2:12 pm
Points: 570
Location: DFW, Texas

Hi,

Good question! Check out the illustration below followed by a brief explanation:

Consider three scenarios:

1. What if B is selected? If B is selected, G must be selected (Rule 2) and C must not be selected (Rules 1 & 3 combined).
2. What if C is selected? If C is selected, B is not selected (Rules 1 & 3) and therefore G is not selected (Rule 4).
3. What if G is selected? If G is selected, B is selected (Rule 4) and C is not selected (Rules 1 & 3).

Notice in all three scenarios, there is no possible way C and G can be selected together, therefore: C G.

In the illustration above, you can see this link between the element in common between both statements, B.

I hope this helps!
Diliabarron
LSAT Novice

Posts: 1
Joined: Wed Jan 24, 2018 6:54 pm
Points: 1

Thank you! Makes sense now.