If the person is a subscriber to Memphis magazine, I will usually take the time to reply, the best I can. If they are not a subscriber, then I knock them aside with my cane and storm out of the store. It's bad enough that you are reading this highly entertaining blog for FREE; must you pick my brain like a pickpocket, too?
But the general answer is that I was considered a boy genius, knowledgeable in any and all fields, collecting diplomas from schools around the globe. In later life I just decided to focus on the more arcane subjects of the city that I have decided to call home (after being exiled from so many others by the police, Boy Scouts, and 4-H clubs).
In fact, here's a charming photo of me at the tender age of 6, just after I had earned my degree in geography (with a minor in cartography) from Case Western Reserve University — a school that I chose merely because I found the name amusing. I still have the old globe, a graduation gift from President Grover Cleveland.