PT13.G1.Q6 Forum

[glucose101]

I think I've been reviewing this question so much that perhaps I'm missing my own diagramming, but I don't see the correct answer. I got it down to B and D, but don't know why it's D. I know it involves Rule 4. Thanks in advance!

[NYCLSATTutor]

I think I've been reviewing this question so much that perhaps I'm missing my own diagramming, but I don't see the correct answer. I got it down to B and D, but don't know why it's D. I know it involves Rule 4. Thanks in advance!

The question premises that L is in group 2. If L is in group 2 then via the contrapositive of H1->L1, H must also be in group 2. If L and H are both in group 2, that means that FJ must be in group 1. After all, if it was L,H,F,J all in group 2, then G & M would be together in group 1. That violates a rule, so now we have L &H in group 2 and F&J in group 1.

Now, D puts K &M in group 1. That would mean that F,J,K,M are in group 1 and L,H,G,N are in group 2. We have a rule that says N2->G1. Therefore, having both G & N in group 2 is impossible. Since that won't work, D is the correct answer.

[glucose101]

I guess I wasn't using the choices, but trying to do it based on the rules. N2-->G1/contra: G2-->N1.

[blackwater88]

I think I've been reviewing this question so much that perhaps I'm missing my own diagramming, but I don't see the correct answer. I got it down to B and D, but don't know why it's D. I know it involves Rule 4. Thanks in advance!

The question premises that L is in group 2. If L is in group 2 then via the contrapositive of H1->L1, H must also be in group 2. If L and H are both in group 2, that means that FJ must be in group 1. After all, if it was L,H,F,J all in group 2, then G & M would be together in group 1. That violates a rule, so now we have L &H in group 2 and F&J in group 1.

Now, D puts K &M in group 1. That would mean that F,J,K,M are in group 1 and L,H,G,N are in group 2. We have a rule that says N2->G1. Therefore, having both G & N in group 2 is impossible. Since that won't work, D is the correct answer.

Dammit, you beat me to it