Diagram

[noah]

Here is a full solution, written by my colleague Dan Gonzalez (and he's one of the authors of our strategy guides).

[LSAT-Chang]

I have a question about the scenario.

It says "Exactly five kinds of material are recycled at these recycling centers: glass, newsprint, plastic, tin, and wood. Each recycling center recycles at least two but no more than three of these kinds of material."

Dan wrote on his diagram:
"Will all the letters be used? Yes. The scenario says that "exactly five kinds of materials" are recycled at these three centers."

But I didn't think of it that way. I thought it was just telling us that materials will be recycled among these five, not necessarily ALL of them will be used. I basically thought it was kind of like a background info letting us know that there are exactly five materials that may be recycled and it is up to us to decide if all of these are used or not and where they should go.

I would assume something like "each material is recycled at least once"... am I not understanding an LSAT wording here?

[noah]

It's a tricky one.

It would have to say something like "Exactly five kinds of materials can be recycled at these centers"

It's probably easier to see with this example: exactly five patients - W, X, Y, Z and A - will be seen by a doctor. You know each patient will be seen.

I hope that helps.

[LSAT-Chang]

It's a tricky one.

It would have to say something like "Exactly five kinds of materials can be recycled at these centers"

It's probably easier to see with this example: exactly five patients - W, X, Y, Z and A - will be seen by a doctor. You know each patient will be seen.

I hope that helps.

Yes that example is very clear to see that all five patients will be seen by the doctor. I guess that "are" recyled is what confused me, because if it said "will be" recycled then I would immediately know that all 5 materials will be recycled. So do you suggest that I interpret "are" as something close to "will be"? I haven't seen a game like this in the past where it wasn't clear to me whether all variables had to be used or not.. have you?

And also, you are saying that "can be" is not "will be" right?

[noah]

Yes to both of your questions about interpretations.

As for this issue coming up, I believe I have been tricked by the LSAT on it before, but I can't recall a specific game.

[cdjmarmon]

So if it said:

"Can be recycled" then that means we DO NOT have to use all 5?
"Will be recycled" we DO have to use all 5?
"Are recycled" we DO have to use all 5?

[noah]

So if it said:

"Can be recycled" then that means we DO NOT have to use all 5?
"Will be recycled" we DO have to use all 5?
"Are recycled" we DO have to use all 5?

Yes.

I'll have to think if I can spot a counter example, but off the top of my head, you got it.

[LAURELNICOLEX3]

Does anyone have an explanation for question number 22? I understand the logic of not having P in center 3, center 1 having P because center two must be taking from center one, but I am not understanding why two would be between W and N if they are co dependent on each other..

[ohthatpatrick]

W depends on N.
N does not depend on W.

You can put N into a group and NOT put W.

(for future posting ... if we don't have a thread going for Q22, then you basically go to Logic Games -> June 2007 Test --> Game 4, and then hit the button for "New Topic" and type in Q22 to start that thread)

I did it for you and put an explanation there:
https://www.manhattanprep.com/lsat/foru ... tml#p47194