Professor JOSEPH BOWER (Harvard Business School): An outsider has a tremendous disadvantage in not really knowing how the place works.

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The trouble with defining words out of context is that people end up not really knowing how to employ them.

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And nowadays people live more in a kind of waiting situation, not really knowing what will be next and what will be the next future.

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The same number admitted to not really even knowing the cost of living in retirement with any sense of accuracy, having not attempted to add up the eventual costs.

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All the furor (if not panic) the signals generated back then, does go to show that what everyone knows is really not worth knowing.

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"The hardest part is not being with the family - when you go away with work you know you're going, you know you're coming back and you know the end date - not knowing that end date was the hardest thing really, " he said.

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