the effect estimator ・ kinetics → four felt axes

When, not how much.

Most of what a stimulant does to you is decided by timing, not size. One blood-level curve splits into three transporter signals, and what you actually feel is never the dopamine level itself — it's the gap between what dopamine is doing and what your brain has already adapted to. That single idea produces the come-up, the plateau that quietly predicts itself away, and a comedown that is your own correction overshooting rather than the drug running out.

Pick something and move the dose. These are the same four lenses the app draws.