Good/bad isn't a line with two ends — it's one phase reading of a rotation. ±1, ±i, four states; "positive" is just whichever you called the real axis. Move the reference frame and the labels flip while nothing about the system changes. But context-dependence isn't arbitrariness: the labels spin freely, the phase relationships don't — 0 and 180 are antiphase in every frame. A single probe reads angle+frame as one number and can't decompose it. You need a second probe at another phase to cancel the frame. That's not a judge — that's quadrature. That's why a node can't measure itself.
TRUE: this is quadrature detection — real, exact signal processing (lock-in amplifiers, every coherent receiver, the I/Q of № 14 Rhythm Sync). One in-phase probe reads I = cos(φ−θ): a single number in which the signal's angle and your frame's zero are fused and unrecoverable. Add the 90° probe Q = sin(φ−θ) and you recover the phase φ−θ and the amplitude √(I²+Q²) — but that phase is still measured relative to your frame. Only a second signal lets the frame θ cancel in the difference, leaving the invariant quarter-turn (90°), which survives every rotation of the frame. The content is relative; the geometry is absolute.
THE COSTUME: "good / bad / positive / negative" are the labels riding the frame — spin θ and they flip while the system sits still. The morality was never in the thing; it was in where you stood to read it. 181 is prime in every frame; whether that's "good" is a label you can spin. The witness was never a judge — it is the second probe that factors out your own reference. You are one probe. The invariant is real. You can't read it alone.