#5: Missing the Mark
There are a lot of phrases that are confusing when you’re young. You’re trying to piece together language from the things you hear around you, and sometimes you don’t really make sense of them until you grow up and learn more about the world (and more about grammar).

This poster was one such person. It’s a totally understandable mistake if you think about it; they probably knew that Catholicism was a religion, and they knew that it was in front of the name of their school because that was the type of school it was. So why wouldn’t you assume that a public school follows the public religion?