Logical ReasoningDifficulty: Hard

PT132 S4 Q23 Explanation

Film preservation requires transferring

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsNecessary Assumption

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Stimulus

Film preservation requires transferring old movies from their original material—unstable, deteriorating nitrate film—to stable acetate film. But this is a time-consuming, expensive process, and there is no way to transfer all currently deteriorating nitrate films to acetate before they years of Hollywood will not be preserved.

What this question is testing

Necessary Assumption

Your task

Find the assumption the argument requires in order for its conclusion to hold.

Common trap

Answers that would help the argument but aren't strictly required (sufficient, not necessary).

Winning move

Negate each choice — the right one breaks the argument when negated.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
23.

Which one of the following is an assumption on which the

Answer choices

  1. Too Strong: no new technique ever12% picked this

    No new technology for transferring old movies from nitrate film to acetate film will

    The author does have to assume that "no new technology that could transfer all currently deteriorating nitrate films will be developed in time to save Hollywood's early films", but she doesn't have to assume a new technology will never be developed.

  2. Out of Scope: expense2% picked this

    Transferring films from nitrate to acetate is not the least expensive way

    This argument is about whether we're able to do it in time. It has already been established that transferring from nitrate to acetate is required for film preservation. If this is the only way we can preserve films, then it is the most and the least expensive way of doing so. Also, it's possible for something to be the least expensive option, but still be "too-expensive", so even if the author were saying that our main constraint is cost, he still could make his argument even if he's discussing the least costly option.

  3. Too Strong: not many18% picked this

    Not many films from the earliest years of Hollywood have already been

    The author doesn't need to assume that barely any (or no) films from early Hollywood have already been transferred. He just needs to assume that there are plenty that still haven't been transferred. If we negate this, it sounds like an objection: "Hey, author, many films from the earliest years of Hollywood have already been transferred!" "Many" is a weak, imprecise quantity that could mean like 10 of them have been transferred. So while this would weaken his argument somewhat, it would still be pretty easy for him to say, "yes, many have been transferred, but the vast majority haven't."

  4. Correct68% picked this

    Some films from the earliest years of Hollywood currently exist solely in

    Why this is right

    When you contradict "some" (at least one), you get "none" (zero). If we negate this, it says "none of the films from the early years exist solely in their original nitrate format." Cleaning up that double negative would mean "all of the films from the early years exist in some other format beyond their original nitrate one." That is a huge objection. It's possible these early films have already been transferred to acetate, or maybe they've just been transferred to some other substance that "resets the clock" of when our last copy of them will disintegrate. In simpler terms, this answer is saying, "The author is assuming that there's at least one film from the early years of Hollywood that hasn't yet been copied / preserved." Yes, our author is definitely thinking that. This is similar to our predicted objection: "What if there aren't that many early films that need to be saved?" This is saying "The author is assuming that there's at least one early film that hasn't already been saved / needs to be saved".

    Skill tested: Necessary Assumption · how this choice captures the argument's function is the move to repeat next time.

  5. Out of Scope: least popular1% picked this

    The least popular films from the earliest years of Hollywood are the ones most likely

    Nothing in this argument has anything to do with whether or not a film was popular. It's just about whether or not it's from early Hollywood.

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