That is an interesting comment. What if he is delusional?
"To the only one that matters, myself."
Speaking as someone who has been delusional, it's not like you'll necessarily notice when it's the case. For myself, such moments were the ones that felt like they made the most sense, even though when lucid those bits were completely illogical.
The self can only be trusted so far, since we can't fully account for our own blind spots.
"I could look at my accomplishments, achievements and milestones as a reference point."
Which of those are referential for not being delusional? Couldn't many of them have been done by someone who isn't really fully intact with reality?
"Speaking as someone who has been delusional, it's not like you'll necessarily notice when it's the case. For myself, such moments were the ones that felt like they made the most sense, even though when lucid those bits were completely illogical. "
I can tell the difference between reality and what my mind might want to perceive it as. It sneaks up on me occasionally, still.
"Which of those are referential for not being delusional? Couldn't many of them have been done by someone who isn't really fully intact with reality?"
If my car, job and reputation were all acquired by some delusional, alternate personality of mine it would be a little scary. But, in that case if it produces these results, then I see no problem with it. As long as we share a common goal.