Diagram

[bailey.danielle98]

Hi
Can someone explain why B ("seat H2 is empty") is not correct. I eliminated C, D and E but still do not see what makes B wrong vs. answer choice A (Seat G3 is empty)?

Couldn't I have a situation as follows?

Seat 3 Q T
Seat 2 R
Seat 1 S U
Rows G H

What makes scenario above wrong...and therefore answer choice B ("seat H2 empty") wrong?

Thanks

[ManhattanPrepLSAT1]

Remember G and H are the rows!

G _ _ _
H _ _ _
_ 1 2 3

So your hypothetical would not satisfy the first constraint that each family member must sit adjacent to and in the same row as at least one other member.

Hope this helps!

[mitrakhanom1]

Can somebody please post the diagram for this game. I got confused on how to diagram the first constraint.

[AnnaT620]

How would you diagram / notate all the rules for this game? What are the inferences you can make for this game?

Many thanks
Anna

[Laura Damone]

Hi there!

I think this game is a great candidate for frames. Here's a doc in which I've set up the game and the frames: https://docs.google.com/document/d/1GmJ ... sp=sharing

Copy that url into your browser and check it out! The starting point of each frame is drawn darker than the rest so you can see the progression, but here's a written explanation, too.

First, I considered rule 1 because it's not easy to diagram. What does it guarantee? What does it prohibit? It guarantees that everyone is next to someone, so it prohibits a row in which only seats 1 and 3 are occupied. Thus, it guarantees that seat 2 is occupied in both rows. Knowing all that felt like enough, and I didn't feel the need to write anything out. If I'd seen this game on a digital test, I also would have highlighted the rule on screen.

Next, I realized that R must be G2. It has to occupy a 2 seat, and it has to be in a row with Q or S or both. Since T and U are filling two seats in row H, R can't be in row H with Q or S, so it's got to be in row G.

Then, I penciled in my exclusion inferences: T can't go in H1 and S and U can't go in a seat 3. That showed me that T has only two placement options: H2 and H3. That's a great divide to frame around if it has enough consequences. Since T determines the position of S and U, I decided that it would be worth trying.

Beneath the master, I drew out my frames. There's only one way the game can play out with T in H2. If T is in H3, there are two ways the game can pan out based on the position of U, so I drew out each one. U must go in row H, and slot H2 must be occupied (in order to satisfy rule 1). So, either U goes in H2, or U goes in H1 and somebody else goes in H2.

With these frames the questions take less than 2 minutes for all 5 so it proved to be a worthy investment of a few minutes at the outset.

Hope this helps!