For unverifiable claims, perhaps, but it's usually far better to simply ignore all unverifiable claims in the first place. It's not useful in debate, either, b

For unverifiable claims, perhaps, but it's usually far better to simply ignore all unverifiable claims in the first place. It's not useful in debate, either, better to simply to stick to debating what facts (if any) formed an opinion, as at least those can be researched.