59 Game 2
Comments
So what you're saying is we attempt to make one of the rules false?
Yep. Two steps:
1. Disprove the bad answers. Use your prior work to disprove bad answer choices. The correct
answer should have only the same effects as the rule it replaces, so you can eliminate any answer choice that isn't proven true in every line of your prior work. This step is exactly the same as our method for dealing with Must Be True questions.
2. Disprove the Old Rule. Using the remaining two or three answer choices, plug them into your diagram and attempt to disprove the old rule. A correct substitution would be the same as the old rule in all instances, so if you can use an answer choice and still invalidate the old rule, that means that answer choice doesn't carry all the same restrictions as the rule it's meant to replace. Get rid of it.
Hello Dave!
I was wondering if we can solve question 10 by using only step 2? I am not going to use step 2 only during the test, but is it theoretically possible?
I was able to create CBT template for answer choices A and C but failed with B and E.
(A) FMILGKH -- violates H-K
(C) GKMHILF -- violates H-k
(B)
New rule: H-G, F/M_1
Old rule negation: K-H, H_1
New rule + Old rule negation (at least one):
Since we can't make H_1, I will use K-H rule to create CBT template. K-H-G, F/M_1
Now we add on our original rule. [GK]-H-[GK], F/M_1, [IL] or [LI], M_1/2/3, F_1/7 --> FAIL!
(D)
New rule: /H_2 -> M-H-G or G-H-M
Old rule negation: K-H, H_1
New rule + Old rule negation (at least one):
(1) M-H-G, K-H
(2) G-H-M, K-H
Now we ad our original rule.
(1) M-H-[GK]-H ---> FAIL!
(2) [GK]-H-M, M_1/2/3 ---> FAIL!
Failed in every possible scenario. THEREFORE, THIS IS THE CORRECT ANSWER!
(E)
New rule: F-H-K
Old rule negation: K-H, H_1
New rule + Old rule negation (at least one):
F-H-K + K-H = F-H-K-H --> FAIL!
F-H-K + H_1 = Impossible --> FAIL!
Please help! Thank you David all the time!
You're absolutely correct. We could always use only Step 2.
The only reason I use Step 1 is that it's a lot faster to perform, so it helps get rid of some bad answers quickly, leaving me less work to do in Step 2.
Good work!
For game 2, question 8, there is an easier way to determine the correct answer... Since the rule states that the "IL" block must occur in any order, as long as they're together ("IL" or "LI"), you can flip the ordering of the two from question #6 (global accounting), which proves the ordering is determined by placing "L" in the 1st position.
I like that you're thinking about using old answers.
But remember that identifying one single iteration of the elements isn't enough to prove that they must be ordered according to that iteration.
For example, we could order them: F H M L I G K. But that doesn't mean that they must be in that order if L is 4th.
Make sense?