It's not that some of these approaches never provide valid arguments.
Under the broader agreement announced Thursday, Craigslist is going further, asking that advertisers provide valid identification.
If Mr. Cherry was placed on the stand in a trial, she said, he "would probably have trouble remembering the questions long enough to provide valid responses".
Other breakdowns were too isolated to cause concern, as when 800 slot machines failed in Delaware and toll roads around Sao Paulo, Brazil, could not provide valid receipts.
"Team Impulse management has repeatedly failed to pay their players on time and to provide valid contracts for their players," Riot said.
To join Clear, or similar Registered Traveler programs that other companies said they would soon start, customers provide valid identification and have their fingerprints and irises scanned electronically.
These results provide valid support for the proposed hypotheses H1, H2 and H3.
Also, people cannot provide valid consent for the processing of their personal data, because of the approach used by Microsoft.
To take advantage of this offer, students or parents must provide valid student identification as defined by the participating retailer.
Provision of comprehensible information is vital if patients are to provide valid informed consent.
Further research in this area may well identify methods which enable many, perhaps most adults to provide valid consent.
