For example, tests do not compensate for gross social inequality, and thus do not tell how able an underprivileged youngster might have been had he grown up under more favorable circumstances.
The iMac packaging was designed to make it obvious how to get the machine on the Internet, and include a polystyrene insert specially designed to double as a prop for the slim instruction manual.
As shocking as this utter failure may be to the nearly 1 billion faithful Facebook users around the world, it's no surprise to anyone who read the initial public offering (IPO) prospectus.
In the past couple of weeks a quarrel has illustrated the value to advertisers of such fine-grained information: Should advertisers assume that people are happy to be tracked and sent behavioural ads?