Logical ReasoningDifficulty: Easy

PT7 S1 Q1 Explanation

Before the printing press, books

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

TopicsWeaken

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Stimulus

Before the printing press, books could be purchased only in expensive manuscript copies. The printing press produced books that were significantly less expensive than the manuscript editions. The public’s demand for printed books in the first years after the invention of the printing press was many times greater than demand had been in the years after publishers first started producing books on the printing press.

What this question is testing

Weaken

Your task

Find the choice that makes the argument's conclusion less likely to be true.

Common trap

Answers that look negative but attack a claim the argument never relied on.

Winning move

Find the assumption the argument depends on, then pick the choice that undermines it.

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

The question
1.

Which one of the following statements, if true, casts doubt on

Answer choices

  1. Opposite Impact (strengthens)1% picked this

    During the first years after the invention of the printing press, letter writing by people who wrote without the assistance of scribes

    This makes the author's explanation more plausible, suggesting that literacy HAS spread (since people don't seem to need scribes or clerks as much to write a letter).

  2. Strengthens (if anything)1% picked this

    Books produced on the printing press are often found with written comments in the margins in the handwriting of the

    Since you have to be literate to write comments in the margin, if anything, this helps the plausibility of the author's story that literacy was on the rise.

  3. Correct90% picked this

    In the first years after the printing press was invented, printed books were purchased primarily by people who had always bought and read expensive

    Why this is right

    This choice suggests that the increase in demand for printed books was not because more people learned to read, but because existing readers who had previously bought expensive manuscripts could now buy more with the same amount of money. This provides an Alternate Explanation for the increased demand, thereby weakening the conclusion that it was due to a newfound ability to read among the general populace. When we see Explain Curious Fact arguments on Weaken (which is the most common type), the most common way to weaken is an Alternate Explanation for the curious fact.

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

  4. Strengthens (if anything)2% picked this

    Books that were printed on the printing press in the first years after its invention often circulated among friends in

    If books circulated among friends, that suggests that all the friends who had temporary custody of the book were able to read it, which supports the plausibility of the author's notion that literacy had spread.

  5. Strengthens6% picked this

    The first printed books published after the invention of the printing press would have been useless to illiterate people, since the

    This strengthens by ruling out an alternate explanation --- we could have said, "Sure more people are buying books now that they're cheaper, but that doesn't mean they can read! They're just buying them for the pictures." But this answer rules out that explanation.

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