> He has severe dementia unfortunately. Sorry about that. I have this theory on dementia that part of the cause (stress among other things) is a change from an

> He has severe dementia unfortunately. Sorry about that. I have this theory on dementia that part of the cause (stress among other things) is a change from an intellectually demanding career or a life involving thinking and a change to either retirement or not having to do much thinking. The delta in other words. So my question is does any of this relate to your father? Did he remain active in thinking past his retirement?