Is the C line necessary when creating intentional models?

I just joined Scholars last night and have been listening to the podcast for over a year and a half. I’ve written numerous intentional and unintentional models over this period of time.

When I write intentional models, I’m mostly moved to start with the T or R line. When completing the remaining lines, the same question always emerges: Is it necessary to put something in the C line? If I’ve filled in T-F-A-R to my satisfaction, what’s the point of putting something for C?

Thank you!