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This seems like an odd question to me. Instead of asking how you can use graphs and flowcharts, ask yourself what tools you need to organize your story. If a flowchart would help, then fine. But ma...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/18107 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
This seems like an odd question to me. Instead of asking how you can use graphs and flowcharts, ask yourself what tools you need to organize your story. If a flowchart would help, then fine. But maybe what you actually want is to write each scene on a notecard and keep them in a stack. You should choose your tools to suit the task you have and the style of doing it that suits you best, not the other way around.