Passage Summary: Some people blame fast food for making us lazy because we eat more of it now, but the author notes that lazy people usually don't exercise, so the food might not be the real cause.

Conclusion: The current data on lethargy are insufficient to prove that fast food consumption is detrimental to health.

Reasoning: While fast food consumption has increased alongside lethargy, the fact that lethargic people often don't exercise provides an alternative explanation for the lethargy.

Analysis: The conclusion is clearly signaled by the word 'Thus' in the final sentence, which serves as the author's main point. Note that the author isn't claiming fast food is healthy; they are simply attacking the evidence used by the researcher. Your task is to distinguish between the researcher's conclusion (fast food is bad) and the science writer's conclusion (the studies don't prove it). In 'Identify the Conclusion' questions, always focus on the author's final stance on the evidence presented.