When you read an article about your subject in the NYT Tuesday Science section, and realize they got it all wrong. Then you read the next article and think, “Wow, how cool that they figured that out.” Even though you know that those scientists are also tearing their hair out about how the NYT Science section got it all wrong.
Now, to make it pithy and rename it BWare’s law, or corollary, then find out that someone else already discovered it.
But that’s okay, because there’s already a named law that says that every named law was discovered by someone before the person whose name is attached to it.