Aging well

Alpha: Mom, how old were you when the Great Chicago Fire happened?
Me: (blink) Uh….that happened long before I was born. I was born in 1972, look in your book and see what date it happened.
Alpha: (fips through book) Oh, so it happened the year before you were born. 1871.
Me: (sigh)….Alpha. That’s 101 years.
Alpha: Oh. Right.