Axis F
Each letter N, S, T, F is a Cognitive Axis: a diameter.
- Introverted end: Fi (negative).
- Extroverted end: Fe (positive).
- Category in validity rules: judging(T/F).
- Extroverted angle on the lattice: 157.5°.
- Introverted angle on the lattice: 337.5° (opposite).
- Color (working palette): #2f9e44.
Ends
Stacks that use F
Every valid stack uses each letter once.