proven

So why has it proven so difficult for police to arrest him?

Despite these proven advantages of a vegan diet, most people continue to eat meat, using strategies like "defensive reasoning" or moral disengagement and avoidance to reduce any psychological unease.

What hasn’t been proven is whether eating mostly organic foods actually makes people any healthier.

And they’ve proven to be the proverbial canary in the coal mine.

"With the proven track record Mark brings to the role, I believe this is a genuinely exciting moment for Stoke City," said Stoke chair John Coates.