I don't want to argue with Asimov, becuase I love his stories, and I loved this article both times I read it.<p>But there's something to be said for the math example, and I know I'm pedandic, but 2+2=17 is probably more wrong than 2+2=purple.. There's going to be no way to explain how you arrive at 17.. You can't argue it..
You could argue however that, "Oh, purple, sorry, well, four always tasted like purple to me, so that's the one I jotted down in a rush"