He really went on and on about that road construction.
Also, he’s not wearing a mask because that would be “awkward,” but he “would wear one if it was important.” And they all have to stand close together up there because the room isn’t big enough, so there ya go. Oh, he spent some time practicing medicine without a license. Did that just happen?
I have a whole list of things I’ve noticed him say over the years that made it abundantly clear that she must not have interacted with him much. Things that a Scottish person would correct, vociferously, each and every time, yet somehow he grew up with a Scottish mother and never learned any of it? Especially because he left for military school over 60 years ago, so how could that be relevant to now?
But that makes me look at your point with new eyes. One of the hallmarks of Alzheimer’s is forgetting new information but remembering things from youth vividly. Maybe he really is reverting to his mother’s speech from when he was a young brat.