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" Here’s another analogy. Human beings bring only a handful of facial features to the blueprint of how we look—two eyes, two eyebrows, a nose, a mouth, a pair of cheekbones, and two ears, all pasted onto a somewhat ovular-to-round face. That particular blueprint doesn’t often vary much, either. Interestingly enough, this is about the same number of essential storytelling parts and milestones that each and every story needs to showcase in order to be successful. Now, consider this: With only these eleven variables to work with, ask yourself how often you see two people who look exactly alike. In a crowd of ten thousand faces, you would be able to differentiate each and every one of them, other than a set of twins or two in attendance. Where we humans are concerned, the miracle of originality resides in the Creator, who applies an engineering-driven process—eleven variables— to an artistic outcome. Where art is concerned, there is something to be learned from that. "
― Larry Brooks , Story Engineering: Character Development, Story Concept, Scene Construction
