He just “says stuff”. I don’t think the concept of Truth really registers with the guy. He wants to persuade people or manipulate people and he doesn’t care how he does it.
Grifters will natter on while watching the mark. When something resonates, they cycle back to it and elaborate. Rinse & repeat.
He is is his own long con. And it paid off well, too. Now, he’s past his sell-by date and the family can’t let go the of the grift.
He’s always been an arrogant POS; it’s just much worse now that he’s older.