A week or two ago, Priscilla and I were chatting about continents. I was telling her the story of participating in a “get to know you”-type game at a party, where I was to tell one truth and one falsehood about myself. I was on the spot, but pretty quickly came up with a good truth that sounded like a falsehood, but was having trouble coming up with a lie that might be true. Quite lamely (in my opinion), I eventually said “I’ve been on three separate continents in my life.” (I’ve actually never left North America, except for Hawaii).

Anyway, she started counting the continents she’d been on, and I was surprised to hear her list “America” as one. I’m mildly ashamed to admit now that I mocked her about this at the time, laughing at the idea that she might consider North and South America to be the same continent. I felt very proud of my recollection since childhood that there are seven continents: North America, South America, Europe, Asia, Africa, Australia, and Antarctica.

It didn’t take long in our conversation, though, before I realized that I – uh – didn’t have much ground to stand upon. Sue, Beth, and other geology-educated people with whom I’d discussed things like this talk a lot about “plates” and stuff, but I’m not sure how much geologists even believe in continents anymore. And, certainly, I’ve pretty much given up thinking that there’s any geological reason to consider Europe and Asia separate continents. And, as these thoughts were going through my head, Pri was telling me that in Brazil they are taught that North and South America are the same continent. Hmmm…

Well, she later sent me two links to Wikipedia pages, one in Portuguese and one in English. Sure enough, it seems that there is not global consensus on this matter. The English page offers a list of different models of the number of continents that are taught world-wide. It claims that the “geographic community” prefers the six continent model that considers Eurasia to be one continent.

I don’t really have any knowledge that would make me feel comfortable even having an opinion on this subject. (Actually, I do take issue with the Portuguese page’s inclusion of “Artico” as a continent. I don’t think there’s any land there, and whatever we call a continent, I think it should involve land.) However, it does highlight two deeply held beliefs of mine:

  1. What’s real is the world, when we describe it we are just trying to model it with words and concepts.
  2. No matter how simply something was taught to us, it might not true. There might not even be any consensus on the matter. Or, the expert consensus might be contrary to what we learned.

So, don’t be quick to make fun of someone who learned something different than you did. And… question everything.

(Kynthia told me that she once gave an impromptu speech with “question everything” as the subject. Maybe even the title. In any event, it might be one of the extremely rare phrases that would fit on a bumper sticker that I’d be willing to wear on my car.)