Passage Summary: A chimp made a lot of noise when he got a big bunch of bananas and his friends took them; the next day he got one banana, stayed quiet, and the keeper thinks he was being a sneaky genius.

Conclusion: The chimpanzee's silence was a calculated tactic intended to prevent other chimpanzees from noticing and taking his food.

Reasoning: Jocko barked when he had a large amount of food and lost it; he remained silent when he had a small amount of food and kept it.

Analysis: The zookeeper is anthropomorphizing Jocko by assuming his silence was a 'stratagem' or a deceptive plan. To weaken this, we need an alternative explanation for the silence that doesn't involve complex tactical thinking. Perhaps Jocko only barks when he is highly excited, and a single banana simply isn't bark-worthy compared to a whole bunch. If the silence is just a lack of excitement rather than a secret plan, the zookeeper's conclusion falls apart. Look for an answer that suggests the quantity of food, rather than a desire to deceive, dictated Jocko's vocalizations.