A quiet nebula around a core tone — weighing every experience against an unargued inner compass.
Zone B · stack position
Click any position to see how the nebula changes — from the deep, steady conviction of a dominant to the volcanic, inward-facing moral certainty of the demon. Drag the maturity slider to watch the lower positions slowly gain fidelity with age.
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With age, lower stack positions gain fidelity, duty cycle, and structural complexity.
Zone C · feeder coupling
Every judging function needs a perceiving partner to deliver raw material. Click a feeder to watch how the nebula changes shape and motion.
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Zone D · verification lab
Watch Fi weigh experiences against its core tone in real time. Each button triggers a different lifecycle event inside the nebula.
Zone E · energy economics
Every invocation of Fi costs energy. The lower it sits in the stack, the more expensive it becomes — and the faster the battery drains.
Zone F · field notes
Patterns from the wild — how Fi shows up in daily life.
An INFP sits quietly in a meeting where everyone agrees on a compromise. Suddenly they say "no" — not loudly, not with a ten-point argument, but with an absolute firmness that stops the room.
Under stress, INFP Fi pairs with tertiary Si: replaying old wounds and old kindnesses against the core tone, re-feeling verdicts instead of re-testing them. Tender, airless, and detached from anything new.
An ESTJ under stress suddenly breaks down into overwhelming, wounded moralizing — accusing others of betrayal and heartlessness with an intensity that startles everyone.
Where Fe reads the emotional tone of the room and builds social harmony, Fi reads the emotional tone of the self and builds personal integrity. Fe trades individual preference for group unity; Fi trades group approval for internal truth.