My father is 91.

[no_hypocrisy]

3. No, he shouldn't even be driving down the street to get milk.

My siblings and I have this joke: we'd take away his keys but he'd go out and buy another car.

He's a stubborn old cuss, that's all.

As for the senility, don't know. No diagnosis and he'll never agree to an evaluation. And he may not even be senile really, just suffering from really bad judgment and stubbornness.