unproven

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.

It was also possible to mark men as red or green flags, and share unproven gossip.

Edison has flatly disputed the lawyers’ assertions, calling their claims about the 2019 fire an “exotic ignition theory” based on “an unproven narrative.”