You do not have to be a pilot or airline executive to grasp the simple concept that the best time to fly is when a storm is not taking place.

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This is a particularly tough concept for young people to grasp, as they cannot conceive of entering a highly competitive job market where the boss has as much access to Facebook and cached images as anyone else.

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The principle of least privilege is not an especially difficult concept to grasp but it can be a real nightmare to implement.

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This is a concept that too few financial advisors and insurance agents grasp when they oversell insurance or investments for retirement.

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