Logical Reasoning

PT15 · S2 · Q6 A primate jawbone found in Namibia

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A primate jawbone found in Namibia in southern Africa has been identified by anthropologists as that of an ape that lived between 10 million and 15 million years ago.

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.

6.

The argument assumes which one of the following?

  1. Modern apes also tend to

    Trap

    4% picked this

  2. Correct

    The ape whose jawbone was

    Why this is right

    Answer B is correct.

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

    85% picked this

  3. There were no apes living

    Trap

    6% picked this

  4. The ape whose jawbone was

    Trap

    2% picked this

  5. The ancient primates were numerous

    Trap

    3% picked this

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