Disagreement is fine. Awareness and intelligence are objectively measurable things though. They're not slipping up names, like say, calling one child a different child's name or not being able to deal with a gish gallop of falsehoods. The medical bar is much higher than what we lay people might judge from our standards of "normal".

I doubt VP Harris is hiding any form of disability for her own career, since it would not help her career. She would be best served personally by having the most competent administration possible, or leading it herself.

Conspiracies are fun, but they tend to fall apart when careful analysis is applied.