Can one of the LSAT geeks please explain to my why answer choice C is correct and not A or D?
Thank you in advance!
This is exactly right! Great core breakdown and wrong answer analysis too!christiankson Wrote:This is a SUFFICIENT ASSUMPTION QUESTION, which means that the correct answer choice will fill the gap and make the conclusion absolutely true based on the premises. The first step is to look at the core.
ohthatpatrick Wrote:You don’t want to symbolize a quantity sentence like “Most clowns are scary” as a conditional.
Conditional statements are about certainty, while “most” statements are about likelihood.
You technically COULD represent “most” as a conditional.
If clown --> PROBABLY scary.
and the contrapositive would be
If you’re something that’s UNLIKELY TO BE SCARY, then you’re not a clown.
But hopefully you see how crazy and ill-advised that is.
(A) is not a quantity sentence, like “Most A’s are B’s". It is a conditional sentence, as given away by the “only if”.
For example:
If “most senators vote against the bill”, then “the bill will not pass”.
That’s not a quantity statement, not “Most Senators will vote against it”.
It’s a rule … a requirement … a hypothetical that comes with a definite consequence.
(A) provides a rule
If it’s not the case that “most members of the commission have given consent”, then “it is impermissible to release the report”.
Do the facts we were provided with in the evidence trigger that rule?
No members of the commission were consulted. Can we then infer that “it’s not the case that most of them gave consent”? Sure. If you weren’t consulted, how could you possibly give consent?
We know that NO members gave consent, since none of them were consulted about it. That is enough to trigger the rule.
Most = more than 50%.
100% of members did not give consent. !00% is more than 50%, so we have triggered the rule.
What is the consequence of the rule? “It is impermissible to release the report”.
Does that allows us to properly infer (derive) the conclusion? Sure.
Impermissible to release = should not have released
Meanwhile, (D)’s rule says
If it’s not the case that “all members would have agreed if consulted”, then “the report should not have been released”.
Do the facts we were provided with in the evidence trigger that rule?
Nope. All we know is that the members weren’t consulted. There’s no way from that to judge whether or not all members would have agreed HAD they been consulted. All we would need to know to trigger the rule in (D) is ONE person who would NOT have agreed had he/she been consulted. But we don't have even that measly fact from the facts provided.
Your big takeaway from this problem is this:
“Don’t focus on dialing in the perfect language that nails what we want to hear. Focus on whether or not each answer choice does the work of allowing us to derive the conclusion.”
Sufficient Assumption + Evidence = Logically derived Conclusion
That’s what every Sufficient Assumption question is about. Some answers are perfectly measured to the missing idea we anticipated. Some “overfill the arrow” and give us something broader/weirder. The test of whether it’s right or wrong is simply can we add it to what we know from the evidence in order to derive the conclusion.
Hope this helps.