Here are some of the examples:

“I’m no doctor, and I had a family member whose dementia contributed to his death. I will be the last one here speculating wildly about Biden’s cognitive abilities relative to his age. But his campaign is irresponsible to let this go unexplained — or undiagnosed, if the case may be.”

https://theintercept.imgix.net/wp-uploads/sites/1/2020/03/ja...

“the question is, does he still have his stuff? How sharp is he?”

Dismiss it if you like, but there is nothing ambiguous or weak about what they said.