Assertion: porcupine's quill | /r/CapableOf | work into the flesh
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text: These quills break off easily and once they enter the predator’s body, tiny barbs in the tip actually pull them deeper into the wound; many unexperienced predators die as the result of porcupine quill injuries, either due to infection, or because the quills work so deep into the flesh that they damage blood vessels or even internal organs!