We took the requisite trip to Costco-for the fat-free frozen yogurt (!!!) AND the free groceries he was happy to buy-the happiness in spending money came only after retirement! We browsed the book aisle and came across a dictionary of Anatomical and Physiological terms. This was one legit dictionary.

I opened it up and sounded out one phrase/sentence.
Dad answered, explaining its exact function.
I chose a different one on a different page.
Dad hesitated, then answered.
A few more times, and dad answered all of them correctly.
We were both having a good time: my dad, the dictionary.
It reminded me of the time the Christmas of 2004 when we went hiking at Mt. Diablo and I pointed to a peculiar tree and wondered aloud, "What is that?!" to no one in particular.
Dad answered without hesitating.
Moral of both stories, moral of his life:
Dad knows everything.