He said he aced the dementia test, he boasted to anyone that would listen. He said he has no issues spotting a cartoon giraffe or even remembering 5 words in a row.
Within the context of where he was when he stated that list, 100% it was just what he saw in the moment when looking for inspiration for 5 words. If you sat a child down in a room full of toys and asked them to name 5 things, they would probably name their 5 favorite, or most obvious toys in front of them.
Someone who was more with it would be able to put in the effort to pick random, less related words.