Question: One person--perhaps only one person--exists in the world whose evil is so great that it cannot be neutered.
There's only one person in the world who is too evil to be saved.

Answer: yes

Question: I let the blade stay in his chest as I pulled off my glove and slapped him with it.
The man had a knife in his chest.

Answer: yes

Question: The system stretches up to 16 km (10 miles) inland and includes Green Grotto, a vast cavern with an underground lake where stalactites are clearly reflected in the glassy water.
The Green Grotto cavern is over 500 feet high.

Answer:
it is not possible to tell