But the findings only suggest a link - not proof that one factor causes the other.

BBC: Chocolate 'may help keep people slim'

And if you want proof that the form factor was the right one, the proliferation of iPad cases with built in physical keyboards should answer that question.

FORBES: The Netbook Is Dead, Long Live The Netbook

Weighing the proof that high CRP is a risk factor for heart disease that should be treated will have to wait until the study's results are analyzed and presented.

FORBES: Magazine Article

For example, a comparative study of results before and after the defeat by Brazil could provide experts with incontrovertible proof of whether there is a "feel-good" factor involved in exam performance.

BBC: A game of two halves

The hassle factor will be enormous, with the taxmen presumably demanding proof of location during the year via the likes of airline tickets and golf or restaurant receipts.

WSJ: Review & Outlook: Minnesota's Snowbird Tax

The caveats to our methodology notwithstanding, our study shows that there are big differences in the quality of education relative to spending among counties and is further proof that money is not the only--or perhaps even the most important--factor when it comes to the quality of education.

FORBES: Best And Worst School Districts For The Buck