The take-away was that a strategy may play out on paper, but the only way to truly test the validity of your product is to put it in front of customers.
If Ms. Rivlin could be called upon now to analyze the numbers to test the validity of purchasing a large private provider like HCA, in a manner that would be credible to President Obama, Democrats, Republicans and everyone else it is my opinion that facts would demonstrate that a dual public system is the silver bullet for fixing healthcare.
Buying a diamond ring soon after buying petrol results in an even higher risk score: thieves often test a card's validity with a small purchase before buying something much bigger.
However, Ponting questioned the validity of a seven-match series with every other major Test-playing nation in South Africa preparing at altitude for the two-week tournament.
There is something deeply contradictory about Walter Mischel a psychologist who spent decades critiquing the validity of personality tests inventing the marshmallow task, a simple test with impressive predictive power.
Confidence in our nuclear weapons could decline over time if we could not test them, and we might be unable to fix future problems in those weapons without tests to insure their validity.