A traditional view of Neanderthals is that they lacked the ability to think symbolically. However, recent evidence suggests this view is mistaken. Using an innovative new technique, researchers established that a cave painting in northern Spain was created at likely the painting was made by a Neanderthal.
What this question is testing
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.
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