Until then, only a few tests had been completed and they lacked validity for various reasons.

Hulda Clark has been criticized because her claims lack scientific validity and consist of anecdotal evidence.

Inductive arguments lack deductive validity and must therefore be asserted or denied in the premises.

Questionnaires are said to often lack validity for a number of reasons.

You imply that firefighters lack the intellect or validity to be as much a part of the decision-making process as others.

These techniques are promising but lack the reliability and validity necessary to be used as a reference for clinical purposes.

Such tests lack true scientific validity, but they provide the best indicators yet developed.

Anyone who examines the task force's "study" and methodology will find that its estimate lacks scientific validity.

In fact, if your efforts lacked validity, my curse might even have promoted them, so that they played a larger part in the false success.