The take-away was that a strategy may play out on paper, but the only way to truly test the validityof your product is to put it in front of customers.
However, Ponting questioned the validityof 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 validityof personality tests inventing the marshmallow task, a simple test with impressive predictive power.