A measurement may proceed only when independent gates pass. 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 control gate must pass
Control 9 is inside 10 plus or minus 1.
10=9+1
The replicate spread gate must also pass
The replicate half-range is 2 and the limit is 2.
2≤2
Acceptance is the conjunction of checked gates
Both checked gates pass, so this training measurement may proceed.