Which means intellectual classroom knowledge has nothing to do with wealth creation.

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Imagery has been impeded by some bad weather which also means there is less than perfect knowledge about what is happening on the ground.

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Although nutritionists are often a little sniffy about dietary supplements, pointing out instead how important it is to eat the right food in the first place, there are corners of society in which people lack either the knowledge or the means to do so, or simply choose to eat poorly.

ECONOMIST: Diet and behaviour

At Maria's school, half the students don't pass Arizona's proficiency exams, which means they don't meet the bar for basic knowledge in math, reading and science.

CNN: Student's success defies all odds

That terrible knowledge means it is possible to predict which members of a family are destined to get the disease, and compare their biochemistry with that of relatives who do not have the mutation.

ECONOMIST: Alzheimer's disease

He puts this down to a limited knowledge of bipolar disorder among GPs and other medical professionals which means there is often a delay in diagnosis and a lack of information about the nature of the disorder.

BBC: Man holding head

Which means that at the PhD level, research universities play the roles of powering innovation and passing their knowledge on to the next generation.

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It is a scenario with which he is content, in the knowledge that the title race - Nottinghamshire and Durham are by no means the only contenders - is highly likely to go, like last year, to the final round of matches next month.

BBC: Durham v Notts a four-day washout