"The characters can't be wittier than people are in real life. They have to be character witty"

This quote by Dylan Moran recommends that characters in a story must not be excessively witty, as this would be unrealistic. Instead, the characters must be witty in a way that is real to their character. This means that the characters need to be amusing in such a way that follows their character and the context of the story. For instance, a character who is usually major and reserved should not all of a sudden end up being a comedic genius. Instead, their wit should be subtle and proper to their character. This will make the characters more believable and relatable to the audience. Eventually, the characters must be amusing in a manner that is true to their character and the story, rather than trying to be wittier than reality.