Passage Summary: A psychologist claims that while coffee makes you a faster worker, it makes you a worse thinker, and since thinking is the most important part of managing, the extra caffeine is a net loss.

Conclusion: Consuming more coffee than one is accustomed to results in a decline in overall management performance.

Reasoning: An experiment showed that extra coffee makes managers faster at processing data but worse at integrating it. Since integration is more vital to management than speed, the net effect is negative.

Analysis: The argument relies on a 'net-benefit' assumption. It assumes that the decrease in integration ability isn't outweighed by the increase in speed or some other unmentioned benefit of coffee. To bridge the gap, the argument needs to assume that there aren't other factors—like increased alertness or mood—that might compensate for the integration deficit. Look for an answer that confirms the 'integration' loss is the deciding factor in 'overall' ability. Apparently, being a jittery, fast-talking manager isn't the same as being a good one.