We have often seen that measurements in sera or urine may have no relationship to events measured in joints.
Now it appears that measurements of the part can be inconsistent.
It argued that measurements concocted in offices in Washington did not adequately reflect recent improvements on the ground in Iraq.
Kimberley Crook, a project manager at the international accounting board, acknowledged that measurements of options values are inexact.
The insurance institute counters that measurements are a good predictor, based on an analysis of more than 5,000 State Farm insurance claims for rear-end collisions.
Special relativity shows that measurements of distance and time depend on how fast you are travelling - a result that goes against our everyday experiences.
But he added that measurements of supporting tissues, called retinal pigment epithelial cells, seemed to show that the therapy had not stopped the degeneration of the eye completely.
Some automakers have criticized this method, saying that measurements cannot reliably predict how well restraints will protect people in actual rear-end collisions.
Even more exciting is that measurements have revealed that these belonged to the largest Australopithecus yet recorded, leading the Star Wars-loving researchers to nickname him Chewie.
The trouble is that measurements deep down, while improving, remain patchy.
He discovered that measurements of sea ice began in the 1960s, but for three decades there were only annual submarine voyages, providing too little data to be sure what was happening more broadly.
