disprove

But a 2011 study of genetic evidence from 30 ethnic groups in India disproved this theory.

In the late 1980s it took off as the environmentally correct alternative fuel, but that's been disproved as well.

It should be noted that this new data is not from some fringe, low-quality study that might be disproved by future research.

As a matter of history, the fact can be of course neither proved nor disproved.