Because it may cause significant failures in pipeline, and these failures are usually low-probability, high-consequence events.

因为它可能会导致管道显著故障，而这些故障通常是低概率，高后果的事件。

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Jackson had the wisdom to look at low-probability but high-consequence events that could rock his business.

FORBES: Magazine Article

The question of how to prepare for low-probability, high-consequence events is one of the most difficult in government and business.

FORBES: The Blurring Line Between Natural and Manmade Disasters

From an investor's perspective, the idea of planning for low-probability, high-consequence events is well treated in Nassim Nicholas Taleb's book The Black Swan: The Impact of the Highly Improbable.

FORBES: Magazine Article