GUY: Here’s my pitch: A guy must bond with his gambler father to get closure on his childhood.
ME: Great. What’s the second act?
GUY: Well, it’s whatever happens between page 25 and page 90.
ME: Right, but how is this explored? So he needs to bond with his father. Do they bond by surfing? Kidnapping a girl? Planning a casino heist.
ME: But they could, right? You see how each avenue of exploration changes the genre, tone and visuals of the movie. How is yours explored?
GUY: I don’t know.
ME: Then you only have half an idea.
The second act is the exploration of the idea. It’s the money part.
The three act structure tends to trip people up. People are either way too into it, or they’re way too dismissive of it. While it’s true that many professional writers don’t set out to neatly color within the lines as they’re writing their work, it’s also true that the three act structure is a useful teaching tool for people who are looking for something, anything to hang an understanding off of as they’re starting out.