To make sure there are no surprises post-construction, models of tall buildings and those surrounding it are sometimes tested inside mathematically accurate wind tunnels, meant to replicate conditions in the real world.

WSJ: Living The High Life

Thousands of people need to be tested and monitored for years to build up an accurate picture of what sort of metabolic patterns could make people ill.

ECONOMIST: Metabolomics

While a lot of this is entertaining, we rarely get what we need out of all this, which is an accurate review of a gadget that's been tested under real world situations.

ENGADGET: Let the polarized reviewing begin!

"We tested this update extensively and have found that the algorithm is very accurate at detecting site quality, but no algorithm is perfect, " the spokesman says.

WSJ: Sites Retool for Google Effect

Yahoo tested its model against the results of the last 10 presidential elections and found that it was accurate 88% of the time, with a 3% margin of error.

FORBES: Yahoo's Signal Predicts Presidential Election: Obama Over Romney

In other words, an accurate, timely report of what was said should be legally fireproof - although that has not yet been tested in the courts.

BBC: Parliamentary privilege, MPs and super-injunctions