Theory 03/Cell division cycle/Termination phase
Exit Needs Checkpoint Satisfaction
The claim
Cycle exit is set by the ratio of checkpoint signal to checkpoint noise, so a weak but consistent signal holds the cycle where a strong noisy one does not.
01Mechanism
The checkpoint averages over time; the ratio determines whether the threshold is reliably crossed.
02Prediction
Arrest reliability should track the ratio.
03Refutation
Exit tracking signal strength alone would remove noise.