MakeMeSmart

One of my favorite podcasts is Make Me Smart, hosted by public radio's Kai Ryssdal and Molly Wood. It's part of the Marketplace family of shows by American Public Media and is a friendly, casual look at the "big picture" of many of the stories of the day. One of their running themes is the "Make Me Smart question" that they ask everyone they interview, and encourage listeners to write or tweet or vlog in with their own answers to:

What is something you thought you knew that it later turned out you were wrong about?

It took me a while to decide what my own answer to that would be, but when I finally did I realized it was going to be way too long for a tweet to explain, so here we go.