Difficulty in scenario set up in Preptest 52, 4th logic game Forum

[secretad]

There are two scenarios that can play out due to the conditional rules.

A world with F>M ---> L>H

And a world with H>L ---> M>F

The last constraint gave us either M> H & K
or H & K > M because M cannot go between the two variables.

So, I then decided to make my two hypothetical scenarios and I notice that the second scenario seems to be incorrect because the answer to #20 is not B, which I selected without giving it a second thought because of the inference work I did.

Tell me how is the second scenario invalid, or how 20 is not B.

[510Chicken]

Your diagram is wrong. I'm fairly certain that there are more than two setups to an unconstrained scenario. In particular, you diagrammed a false contrapositive of rule 3. (F > M --> L > H) does not mean (M > F --> H > L) as you have in scenario 2. You're missing (M > F , L > H). Also, rule 3 does not react in overly restrictive ways with rule 4, which means that there are a bunch of permutations that you don't have. Not that you need them.

The correct interactions for 20 are included below.

--ImageRemoved-- (LinkRemoved)

K must be last. Everything else comes before it except for L, but L is given to be 3rd. As you can see, H does not need to precede L. M must precede H. So (E).

[secretad]

Yeah my bad on that. I don't know why I made that faulty "inference"

We know what happens when F>M, but we do not know anything about M>F.

I reworked the game and it went much better.

I would like to ask a general question on conditional sequencing games because these games, while workable, take so much of my time. They are not necessarily difficult, just time consuming.

I feel as if sometimes I am missing a big deduction. What can one do with conditionals with some straight sequencing rules such as this game?

I assume the only time I can infer something is if I am given two conditionals such as M>F -> something

and F>M -> something. That would give me all of the logical world to work with and could then tie in the straight sequencing rules if they given.

Am I correct in this thinking? And is there any other time when one could infer something, like would an if and only if be unique at all in making deductions?