Finally someone has done the only valid method of using measured temperatures at different sites and different climates to say something about the climate. (realclimatescience.com)
She emphasizes the mechanisms that Western society has historically regarded as valid methods for building and accumulating knowledge. (thechimneynyc.com)
The selection must be made by a scientifically valid method and all students / drivers covered by this rule must have an equal chance of being tested. (cdltmds.com)