PrepTest 155

[lcid:3719] Prep Test 155 LSAT — Logical Reasoning — S4 Logical reasoning

Question prompt

Computer security experts correctly Remaining source text redacted.
Why the credited answer is right

Credited answer: D

The notes below walk through why it fits the stem and how to eliminate the rest.

Question Type

Strengthen with Sufficient Premise Questions

Answer choices

  1. A
    There are ways to Remaining source text redacted.
    Why choice A is not credited
    Incorrect. If this answer stated they could be made as secure as the other options, it might strengthen the argument. However, as written, it doesn't guarantee that passwords are here to stay, as it doesn't talk about expense.
  2. B
    Any security option that Remaining source text redacted.
    Why choice B is not credited
    Incorrect. This answer doesn't connect to the conclusion about widespread adoption, so it can't be sufficient.
  3. C
    Most computer security experts Remaining source text redacted.
    Why choice C is not credited
    Incorrect. This answer is about the beliefs of the computer security experts, which aren't established to be relevant to the actual adoption of security measures.
  4. D
    Security options that are Remaining source text redacted.
    Why choice D matches the stem
    Correct. Argument or Facts:
    Argument

    Valid or Flawed:
    Flawed

    Question Type:
    Strengthen with Sufficient Premise

    Stimulus Summary:
    Non-password security measures are more expensive.
    Non-passwords replace passwords → Widely adopted
    Therefore, non-passwords won't replace passwords.

    Answer Anticipation:
    The conclusion matches with the contrapositive of the conditional statement:
    Not widely adopted → Non-passwords won't replace passwords.
    The premises don't establish that non-passwords won't be widely adopted, though—just that they're more expensive. So the correct answer will connect that expense with not being widely adopted.

    Key Takeaway:
    Strengthen with Sufficient Premise questions are frequently about connecting an idea from the premise to a new idea in the conclusion. Conditional statements are also common, so be on the lookout for them, as well!
  5. E
    As soon as a Remaining source text redacted.
    Why choice E is not credited
    Incorrect. While this answer choice is in the world of our anticipation, it doesn't establish when these options will develop, so it doesn't connect to the conclusion about the timeline for this replacement happening.

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