Logical ReasoningDifficulty: Medium

PT15 S3 Q3 Explanation

Organization president: The stationery and envelopes

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

TopicsNecessary Assumption

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Stimulus

Organization president: The stationery and envelopes used in all of the mailings from our national headquarters are made from recycled paper, and we never put anything but letters in the envelopes. When the envelopes have windows, these windows are envelopes, and thus these mailings, are completely recyclable.

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
3.

Which one of the following is an assumption on which the organization

Answer choices

  1. Trap3% picked this

    All the paper used by the organization for purposes other than

  2. Trap3% picked this

    The mailings from the organization’s national headquarters always use envelopes that

  3. Correct79% picked this

    The envelope windows made from recycled material

    Why this is right

    Answer C is correct.

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

  4. Trap5% picked this

    The envelopes and stationery used in the organization’s mailings are

  5. Trap10% picked this

    The organization sends mailings only from its

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