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https://classic.7sage.com/lsat_explanations/lsat-19-section-4-question-11/
(B) None of the films released in country Z in 1992 were based on books other than novels.
My hunch tells me the answer is B, and I am pretty sure it is the answer, but I need some clarity. Because it didn't really match my prephrase that "if 1992 films, then no more than 25% based on books from 1991. I see how B could be a missing premise, but I don't see it as a sufficient assumption, as it able to make the argument valid.
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Thank you guys, truly appreciate the explanation and clarity.
When I get in tonight I will add to the above.
https://classic.7sage.com/lsat_explanations/lsat-19-section-4-question-11/
P: 500 books in 1991: novels
25 of movies in 1992: based on the novels
100 movies were released in 1992
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C: No more than 25% of the movies were based on books
We can conclude from the existing premises that no more than 25% of the movies were based on the novels. But the conclusion says “books” instead. So if we fill that gap, it becomes valid.
(B): SA: based on the novels = based on books
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https://classic.7sage.com/lsat_explanations/lsat-19-section-4-question-11/
Hint: Does 'books' = 'novels'?
Perfect argument:
P: A -> B
P: B -> C
C: A -> C