Look at the fights America has gone through over standardised testing.

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The University of Phoenix views its admissions approach as being inclusive, arguing that bricks-and-mortar universities exert a form of elitism by using grades and standardised testing as a way of restricting class size, whereas the distance-learning university can offer places to a wider student body whose priority is simply to move ahead.

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Besides various technical problems, such as getting enough standardised equipment to different airports, persuading grumpy passengers trundling off a long-haul flight to hang around for testing is hard, even when they are rewarded with air miles, as they were in the South African study.

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