You havent provided one! Youve accused someone of saying things they did not say, because you cannot defend against what they actually said. Bidens health and mental coherence are being judged as a candidate of US president, not as an old person. Being old does not grant any immunity from these criticisms
No wonder you're confused if you can't follow a one-topic conversation.
People are insisting Biden perform physically better than not just other old people during this one media circus, but most people, ignoring that acrobatics are not an integral part of being a president.
He's been working well and achieving good results for 4 years.
If you have so much trouble reading that you become confused by simple sentences and examples, you probably should go practice for a while before attempting conversation.