One necessary ingredient is a tradition of asking and repeating questions until a clear answer emerges, suggests Clayton Rose, a banker who now teaches at Harvard Business School.

“其中一个必要的因素就是要有提出问题和重复提问的传统，直到一个清晰答案出现”，Clayton Rose—现在哈佛商学院教书的银行家如此建议道。

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It also said operators waste time repeating questions and use inconsistent questioning procedures.

WSJ: Glitches in new NYC 911 system

Now the new gripe appears to be iPhone 4S users repeating simple questions to Apple's Siri, a robotic assistant.

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Many reporters have also been determined to avoid repeating the passive path taken by many colleagues before the Iraq war, when tough questions were not asked.

CNN: Commentary: Obama should listen to Biden