Logical Reasoning

PT159 · S1 · Q21 Professor O’Brien: Any of my students who heard

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Professor O’Brien: Any of my students who heard Mercado’s lecture from the beginning would have thought it was fascinating, and I know that some of my students did think it was fascinating, so some of my students must have heard it from the beginning.

Your task

Describe the reasoning error the argument actually commits.

Common trap

Answers that name a real logical flaw the argument doesn't actually make.

Winning move

Articulate the gap in the reasoning yourself, then match it to the choice that describes that gap.

21.

The conclusion of Professor O'Brien's argument does not follow logically from its premises because of the possibility that

  1. some of Professor O’Brien’s students

    Trap

    14% picked this

  2. many people who are not

    Trap

    10% picked this

  3. some of Professor O’Brien’s students

    Trap

    6% picked this

  4. Correct

    no one who heard the

    Why this is right

    Answer D is correct.

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

    57% picked this

  5. not everyone who arrived at

    Trap

    13% picked this

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