Q20

[steves]

Now I'm really confused:(

For A, I thought K has to be in--so I eliminated A

For B, the list is F, H, K--but the solution shows F, H, M

[ohthatpatrick]

Yeah, that slide image is just messed up for several reasons, the most important one being that the wrong correct answer choice is circled.

B is the correct answer.

Thanks for bringing that to our attention. I'm gonna delete that trainwreck and get a fixed version up there soon.

That slide was grabbed from a presentation that eliminated other answer choices in other ways.

It started by asking "In our previous scenarios, who has been OUT?"

In Q18, we had this scenario:
LHF | K M/G | G/M
G or M could have been OUT. So we kill off any answers with G or M.

That gets rid of (D) and (E).

Next, we would investigate if K can be OUT.

However, here's what gets triggered if K is OUT.
~Kt --> (FHM)t --> ~Gs

We've got
__ __ | F H M | K

So if G can't go in s, then we don't have two people for s.

Since K can NOT be out, he must be in. We can eliminate (A).

Last thing to check is L. Can L be OUT?

If L is OUT, we trigger
~Lt --> ~Gs

Okay, so let's put G in t.

__ __ | G __ | L

Try to finish it off in a legal way.

FHM | GK | L

Looks good. L can be OUT. Eliminate (C) and pick (B).

Pretty tough grinder of a question there.