Case records often lacked proof that children went to school or had received medical care or social services.

This story, however, lacks proof, and cannot be traced further back than the 17th or 18th century at most.

This view might lack scientific proof, but the use of supplementation to combat low blood levels does not.

He wanted to verify what was at once plausible and lacking proof.

However, the Democrats' assertion of a direct link lacks proof, too.

Certainly I must assume as much, since you lack proof of your claim.

Even then, we would likely have lacked admissible criminal proof.

An opinion is perceived and assumed to be true, but lacks proof or evidence.

She also said the state lacked proof that some of the education programs it was underwriting were working.

A citation for lacking proof of insurance was later dismissed.