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As Dekker has posed, investigators should focus on the circumstances of the time and disregard knowledge of the outcome.
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A top-down systems oriented approach shows how different parties may contribute to safety, considering their organizational affiliations.
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A causal-chain model of accidents is effective in investigating accidents which causes are solely due to failures of the system.
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"enormous" (L.15) is the same as large.
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never before has the US experienced such a profound crisis of faith in government.