So glad to hear that your dad is at least a little better. My friend (I told you about her upthread) who did this after back surgery is mentally back from where ever she was. She is still weak from spending a month or more in bed but her mind is totally back now. I feel that your father will come back as well.
I certainly hope so, and I'm glad your friend is better.
The doctors wanted to do a CT scan of his head last week, and Dad refused, let's say "adamantly." Maybe when he comes to his senses a bit more, we can get that done.