Logical ReasoningDifficulty: Medium

PT133 S1 Q7 Explanation

The cause of the epidemic

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Stimulus

The cause of the epidemic that devastated Athens in 430 B.C. can finally be identified. Accounts of the epidemic mention the hiccups experienced by many victims, a symptom of no known disease except that caused by the recently discovered Ebola virus. Moreover, other symptoms are mentioned in the accounts of the Athenian epidemic.

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
7.

Each of the following, if true, weakens the

Answer choices

  1. Lowers Plausibility of Ebola6% picked this

    Victims of the Ebola virus experience many symptoms that do not appear in any of the accounts

    If Ebola has some many other telltale symptoms that aren't part of what we know about the epidemic, that weakens the plausibility that this epidemic was Ebola.

  2. Correct71% picked this

    Not all of those who are victims of the Ebola virus are

    Why this is right

    This was almost guaranteed to be the right answer from the "not all". That language is so weak that it's almost never a correct answer on Strengthen / Weaken / Paradox. Since we're looking at an EXCEPT question (i.e. we're going to pick something that would be an incorrect answer on Weaken), we would be attracted to this answer. This just says there has been at least one person in history who had Ebola but not hiccups. Okay, cool. Did the author need it to be that 100% of people with Ebola get hiccups? No, 99% is plenty. We can say that "loss of taste and smell" isn't associated with any disease except COVID-19, but that doesn't mean we're saying that every single person who gets COVID-19 loses their taste and smell.

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

  3. Lowers Plausibility of Ebola7% picked this

    The Ebola virus's host animals did not live in Athens at the time of

    If the animals that Ebola comes from didn't live in 430 B.C. Athens, then that makes the Ebola hypothesis way less likely.

  4. Lowers Plausibility of Ebola9% picked this

    The Ebola virus is much more contagious than the disease that caused the Athenian epidemic was

    Just like choice (A), this gives a mismatch between what we'd expect from an Ebola outbreak and what we know of the Athenian epidemic. We'd expect to hear that the illness was very, very contagious, whereas what we know about the Athenian epidemic does not sound like they were dealing with an illness that was that contagious.

  5. Lowers Plausibility of Ebola7% picked this

    The epidemics known to have been caused by the Ebola virus are usually shorter-lived than

    Just like choices (A) and (D), this gives a mismatch between what we'd expect from an Ebola outbreak and what we know of the Athenian epidemic. We'd expect to hear that an Ebola epidemic didn't last super long, but what we've heard about the Athenian epidemic is that it did last a long time.

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