Not directly related to the article, but tangential: sometimes I wonder “how do I know that right now, I’m not in fact sitting in a wheelchair in an elderly’s h

Not directly related to the article, but tangential: sometimes I wonder “how do I know that right now, I’m not in fact sitting in a wheelchair in an elderly’s home, with final stage dementia, and my dementia-ridden mind telling me I’m writing this comment on Hacker News as a healthy 40-something?”