The complaints about Biden's cognitive abilities is so strange when it gets spammed, these folks must have never watched Trump's train of thought wander away in speeches before.
Not really sure if you're serious, but the night Trump was sworn in and took office, he talked for multiple hours straight, without a teleprompter (as always), with reason and a red thread through the entire thing. You may not agree with his policies, but to claim that his mental health is declining is ridiculous.
OTOH, watching Biden spontaneously become a Roomba, walking away in arbitrary directions, always having his handlers with him, etc. is ultimately sad. I dont think people point it out to ridicule, I think it's a serious situation, especially given the fact that he was commander in chief for 4 years.
Ontopic: This is just plain bs of course. Nowhere is described how a pardon must happen, a president in the US can do it through words solely.