This is the crux of the matter, really: nobody can do a valid test.
The only valid test of a poet's authority lies, of course, in the poem itself.
The only valid test is whether or not they deserve the label of gangsters".
We want to do a scientifically valid test of the structural strength of the new iPhones as well as that of comparable phones, and we'll have results soon.
But, of course, "coolness" is not really a valid test for literary worth (or anything else for that matter, except trousers).
Until you do, you cannot make any claims about digital piracy from personal experience, because you haven't done a valid test".
In 1998, the National Institutes of Health, part of the US Department of Health, said it did not have a valid test and that there was "no data to indicate that ADHD is due to a brain malfunction".
"This will require they produce valid test data on the bolts and associated equipment to be used in the specified operational and environmental conditions and that this use will produce a tolerable risk of catastrophic failure," he said.
Executives say that a valid test of practical intelligence could be a valuable tool in making hiring decisions, particularly because of the speed with which managers must now make decisions.
Dr. Peter Davis, manager of a research project to produce a blood test to detect the use of erythropoietin (EPO), said research was ahead of schedule and he expected a valid test to be available by mid June.
In which case, a more valid test would have been a simple off-by-heart test: "Learn off by heart as much of the Oxford English Dictionary as you can".
