Adding to above, it is difficult for someone with dementia to sort through a complex question. Their brain isn't working well. Often, simple yes/no questions are the best. I know for my MIL we couldn't ask where does it hurt --- we had to say does your head hurt AND point to her head at the same time. And then go through the likely places where she traditionally had issues.
Often, dementia patients DON'T remember saying things; he may in fact not understand what you're talking about. I found that when speaking to my mom, who had vascular dementia, I had to slow down and speak clearly and use fewer words.
One more thing. Discussing emotional things that are in the past? Probably not a good idea.
Or he really might not remember! Dementia is like that.
Often, dementia patients DON'T remember saying things; he may in fact not understand what you're talking about. I found that when speaking to my mom, who had vascular dementia, I had to slow down and speak clearly and use fewer words.
One more thing. Discussing emotional things that are in the past? Probably not a good idea.