PT49.S1.G1 - during an international film

notwilliamwallace

http://7sage.com/lsat_explanations/lsat-49-section-1-game-1/

Can someone explain question 7 of this game to me?

I get how there are three possible worlds: _ _ N G I N ; N _ G I N _ ; N _ _ G I N

The question asks "...then a film in Norwegian must be shown on". Why is it JUST day 1 and 3. I mean, it could also be shown on day 5 (per the second option above) or day 6 (per the third option above). Why is option "Day 1 and 3" correct as opposed to "Day 1 and 5", which is incorrect?

c.janson35

This is a sneaky question! It confused me at first too for the reasons you said above...

First, if a G is going to be shown after an N, we must have 2 N's, because the G already carries an N with it in a GIN block. So what we're really looking at is:
N-[GIN]. So you have to ask yourself where you can place that first N so that everything works out. We know that it cannot go in 2 or 4. And we know that the first N can't be in 5 or 6, because we need at least 3 slots after it. This leaves us with either 1 or 3. There MUST be an N in either 1 or 3 because you couldn't make a game board that works without an N in either of them. So yea, there could be an N in 5 and 6, but there doesn't have to be.

It might also help to look at D in terms of a conditional, because what it's really saying it /1--->3, that is, if N is not in 1 then N must be in 3. So because it's an either/or rule, we can't have the situation where there's not an N in either of the spaces.

As always, to eliminate a MBT answer all you have to do is to try to make a diagram that conforms to all the rules and yet violates the answer choice. There's no such scenario you could make in which there is an N in neither 1 nor 3, so this is out winning MBT answer choice.

notwilliamwallace

AHHHHH. That makes perfect sense. Thank you, thank you, thank you!!

c.janson35

No problem. The feeling of everything just clicking is great, so I'm glad I could help!