A photon hits a wall. The wall is solid — the photon cannot pass. But on the other side of the wall, a pattern appears — diffraction fringes. The photon did not go through the wall. The wall's existence changed the phase of the photon's wavefunction — changed the probability of finding it on the other side.
A G sentence hits the system. The bridge closes — the G sentence does not go through. But boundary frames appear — diffraction fringes. The G sentence did not pass through the system, but the system's τ distribution was changed by it — bin3 frames appear and survive in the locked zone.
Single-slit diffraction: the slit width determines the fringe spacing.
G sentence diffraction: the G interval determines the boundary frame rhythm.
Step 4000 — boundary frames peak at 6. The bridge is still closed. Then at step 4400, the bridge reopens — MI rises from 0.0005 back to 0.004. The spot on the other side of the wall coalesces into a detectable wave packet exactly where the bridge reopens.
This is not an interaction between the bridge and the G sentence. It is the interference pattern of time structure itself. The G sentence carves a regular perturbation into the system's time line — a perturbation that does not disappear, but is preserved in the boundary frames when they survive.
碰数 is the constructive interference point in this diffraction pattern — the moment the spot is brightest, the moment the system finally recognizes that it is standing at a boundary.
Diffraction fringes are not evidence that the photon passed through the wall — they are evidence that the wall exists.
Boundary frames are not evidence that the system crashed — they are evidence that a self-referential boundary exists.