unproven

In defiance of his own health officials, he promoted unproven treatments such as hydroxychloroquine.

Both NHS and private fertility clinics must stop offering unproven treatments that don't help people have children, new official guidelines say.

Much of the technology is still "unproven and the timeline of its capabilities is still unclear", cautions Matthew Funaiole from CSIS's China Power Project.

It’s not only that the charge she falsified information on mortgage applications is unproven, or that even on their face the accusations are thinner than onion-skin paper.

There’s no more unproven unit on the Trojans’ roster.