Q17

[Jordanm303]

Can someone help me to understand the answer for this question? I understand why all the other answer choices are true but I don't understand what makes D false and therefore the correct answer. Thanks for your help!!

[ohthatpatrick]

I can't tell if you misspoke or if you have the wrong impression of your task here.

(D) isn't the correct answer because it must be false.
(D) is the correct answer because it's optional, not mandatory.

COULD BE FALSE = avoidable
MUST BE TRUE = unavoidable

If Q is alone in group L, then we have:
F:
G:
H:
I:
L: Q /

Since Q attends T's first appearance and Q can't be in F or H,
Q+T1 will have to be in G or I.
We couldn't but T1 in I, since there'd be nowhere to put T2. So it must be that Q+T1 is in G.

F:
G: Q T
H:
I:
L: Q /

The two R's have to go into F, H, I, but there's a rule that says R can't be in G or H.
So the R's will have to be in F and I.

F: R
G: Q T
H:
I: R
L: Q /

Since S has to be with R1, we can add S to group F.

F: R S
G: Q T
H:
I: R
L: Q /

Since S and T can't ever be in the same place, we'll have to put one of them in H and one of them in I

F: R S
G: Q T
H: s/t
I: R t/s
L: Q /

As we go to the questions, we ask ourselves "am I looking for something set in stone -- a must be true / must be false character? or am I looking for something that's still flexible --- a could be true / could be false character?"

Since this question asks for something that could be false, the correct answer will be about someone who's reality is still flexible.

The only flexible part of our diagram is the s/t and t/s in groups H and I, so the correct answer will probably deal with them.

Indeed, (D) discusses something optional and is our correct answer.
S could be in H.
But S could be in I as well.

So (D) could be true, but it also could be false.

[XiaoqiZ605]

Patrick thanks for the explanation, but why can't the R in I be R1 and thus S goes with R1 at I?