It was based on medical and genetics theories which are now of questionable scientific validity.

Given its limited attendance and location, this kurultai was of questionable validity.

The referendum in itself and its results are of questionable validity.

They were first described in 1973 from scale material that is now of questionable validity.

No student's future should depend on instruments of such questionable validity.

The data on which the entire book is based are of questionable validity and are used in ways that cannot be justified.

Similar scientific studies of questionable validity are also cited.

Of a band with questionable artistic validity who'd clearly run out of anything to say whatsoever!

Meanwhile, a significant number of nursing studies result in conclusions of questionable validity.

The report said the process by which the accuser identified the three men was of "questionable validity."