Bright-state fluorescence is a checked threshold result. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
The readout cites a checked internal state
The cited state bit is 1 before the photon count is interpreted.
bstate=1
Bright state crosses the count threshold
The count is 12 against threshold 10, giving result bit 1.