A threshold decision is only trusted after endpoint and equality rows are visible. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
A readout threshold only means something with endpoints
The calibrated zero endpoint is 2, the threshold is 5, and the one endpoint is 8.
sz=2,T=5,so=8
Three signal rows expose the repeat boundary
The low endpoint, equality row, and high endpoint are all shown. Equality returns repeat instead of guessing zero or one.
sz222s258T555so888resultzerorepeatone
The high endpoint is above threshold
The high row has signal 8, which is above threshold 5, so the displayed result is one.
8>5⇒∣1⟩
Threshold rows are not a noise distribution
This finite model only checks endpoint, boundary, and endpoint. Histograms, drift, and stochastic detector noise are deferred.