Not entirely. Any number of voters who only get their news sporadically from the MSM are not fully aware of Biden's dementia. An effective ad with date captions could show Biden saying, "I'm a proud Democrat running for the US Senate." "I'm a proud Democrat running for Vice President." I'm Joe Biden running for senator from North Carolina." (or whatever state he dropped the bomb in) Or "I'm Joe Biden, Joe Biden's wife."
Followed by Trump saying, "OK, Joe. I approve of this ad."
Adding to the mix, I'd push:
"Voting for Biden is really voting for a Harris/Pelosi administration. It's called 'Bait and Switch'.
The Presidency is a pressure-cooker environment and you want to put an addled 78-year-old man in there?
Pelosi dusted off the 25th Amendment (incapacitated President) not to use against President Trump, but to lever out Biden.
That means Harris becomes President and Pelosi becomes VP.
Do you hate President Trump THAT much that you would put America's future into the hands of those two?"