Passage Summary: An airport official argues that it is safe to put runways closer together because official reports show very few errors, dismissing critics who use different data.

Conclusion: Runways can be built closer together without significantly increasing safety risks.

Reasoning: Official pilot reports show a very low rate of planes straying off course, and the higher rates cited by critics come from less reliable sources like air traffic control tapes.

Analysis: The administrator's argument hinges on the assumption that pilot reports are inherently more reliable than air traffic control tapes. However, there is a glaring potential for bias here, as pilots might be hesitant to self-report errors that could jeopardize their careers. You should look for an answer choice that identifies this failure to consider that the 'thorough' reports might actually be less objective than the 'partial' tapes. It is a classic case of trusting a source that has a vested interest in the outcome.