Here we have a Cannot Be True question. Our correct answer is the one that must be false.
Let's diagram this.
"Samantha likes both oolong and green tea,"
P1: S ==> O and GT not O or not GT ==> not S
"none of her friends likes both."
P2: SF ==> not O or not GT O and GT ==> not SF
"all of her friends like black tea."
P3: SF ==> BT Not BT ==> not SF
Answer choice (E) sates: "One of Samantha's friends like all the kinds of teas that Samantha likes."
Well, we know that Samantha likes both oolong and green tea. We also know that none of her friends likes both oolong and green tea. Thus, none of Samantha's friends can like all the kinds of teas that Samantha likes.
You can see this in the contrapositive of "P2." If someone likes both oolong and green tea, then they are not one of Samantha's friends.
Therefore, answer choice (E) is correct because it cannot be true.
Hope that was helpful! Please let us know if you have any other questions.
Abigail-OkerekeSeptember 9, 2021
I understand why E cannot be true. However, I was conflicted between E and C. Why is C incorrect?
DiegoCOctober 19, 2021
Why is the answer not C is saying exact the same thing
jakennedyJanuary 19, 2022
Hi @DiegoC @Abigail-Okereke
C isn’t right because it says “like exactly the same kinds of tea as EACH OTHER” rather than “as Samantha”. We know that none of the friends like both oolong and green tea and that they all like black tea. Imagine they all only like the black tea and no other type of tea. In that case, they would all like exactly the same kinds of tea, so answer choice C COULD be true.
Let me know if you have any other questions!
ReneeNovember 23, 2022
Even though I selected the correct answer. I'm not sure I clearly understand the stimulus that says, "...but not both. So, I read the explanation on one of the incorrect answers that says, "Or statements on the LSAT are inclusive, not exclusive. That means all or statements have an implied or both at the end of them, unless they specifically state but not both. Based on the rule about Samantha's friends, it's possible that one (or all of them) dislike both green and oolong tea.
Should we always assume when it says, "but not both" this means we diagram it as an or statement and remember that it could also mean BOTH? I just wanted to be clear I was interpreting the statement correctly about "Or statements on the LSAT are inclusive, not exclusive" and what this means in the context when we see answers or stimulus that says, "both"
Emil-KunkinNovember 27, 2022
I would have my default "or " meaning that it could be both, and in a scenario like this, where we are told but not both, I would maybe add an asterix or just write "bnb" to clarify this is a but not both situation.
