Let me give some examples. I had a new roof put on a week ago. When I got home, I asked him, "Did the roofers talk to you?" "No." "They didn't come to the door?" "No." I then spoke to the roofer who said he had spoken to my father. When I told him, he said he talked to them about driving on the lawn and not the roof even though I hadn't specified. Plus, the roofer did talk to him about the bad piece on the roof. A few days later though, I asked him why there were so many nails under the tiling in the foyer in the basement. He told me that they put in two layers of plywood (he actually built most of the house). I asked if they did that everywhere, and he said yes. He also was able to immediately find the pool extension tube that we haven't used in over a year when I needed it to try to rescue a hawk. He spends all day in his recliner, mostly asleep. He doesn't care about anything. He even leaves on lights. He used to be anal about turning them all off. He ignores most questions and answers others as simply as possible. Sometimes, I wonder how he can be alive but then he can answer specific questions about activities from 50 years ago. Yet, when I got an invitation over a year ago and didn't know who it was, he didn't either. There was an e-mail on the card, and person was his first cousin. When I told him about her, he still didn't know who she was. My father had dementia testing two years ago, and they said mild to moderate impairment at that time but would not diagnose since he had just gotten through a period of hyper-mania and psychosis (he's bipolar). Since he refuses to see a doctor or have any tests because "Nothin's wrong with me," can I feel pretty confident that yep, he has dementia?