June 2007 LSAT, Game 2, #9

Onward through Game 2 of the June 2007 LSAT.  Last week, I created a setup for the game. Question 9 adds three new rules that apply only for this question: 1) Greed is shown exactly three times; 2) Harvest is shown exactly twice; 3) Limelight is shown exactly once. The question asks "Which one of the following must be true" but I'll start with the new rules before looking at the answer choices. Let's start with the big one first: Greed is shown three times. Since a movie can't be shown twice on a given day, and there are only three days, that means G has to be shown every day. On Thursday, that means G is shown sometime before H, since H has to be last on Thursday:

Thursday:   G  H |

On Friday, G will have to be shown last, because either G or L has to be shown last on Friday and both can't be shown on Friday. This means L can't be shown at all on Friday:

Friday:              G | L

On Saturday, G will have to be shown last, because either G or H has to be shown last on Saturday and both can't be shown on Saturday. This means H can't be shown at all on Saturday:

Saturday:         G | H

Wow, that's a lot. Before I even look at the new rules about H and L, my diagram looks like this:

Thursday:     G  H |

Friday:                G | L

Saturday:           G | H

 

Turning to the rule about Harvest, if Harvest has to go twice (and if it's already going on Thursday, and can't go on Friday, then H will have to go sometime before G on Friday.

Thursday:     G  H |

Friday:          H  G | L

Saturday:           G | H

So that's G and H both completely determined. The final issue is L, which must go exactly once. It can't go on Friday, but it can go either Thursday or Saturday. At this point, I'll turn to the answers. Remember, we're looking for a must be true.

A)  All three films could be shown on Thursday, but they don't have to be shown on Thursday because L could go on Saturday instead. So this isn't the answer.

B)  No, Saturday could have either one or two films.

C)  No, L doesn't have to be shown Thursday.

D)  No, L could also be shown Saturday.

E)  Yep--see the diagram and reasoning above--both H and G have to be shown on Friday. So this is the answer to our "must be true" question.

(Note that our diagram for this question applies only to this question, since we were given new rules that only apply to this question.)