A policy floor on enabled channels is separate from the trigger bit. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Accepted candidate still lacks enabled-channel margin
Candidate channel 2 is accepted by the trigger bit 1. Enabled channel count is 3.
m=E−Emin=3−4=−1,fail
Four enabled channels exactly meet the policy floor
Candidate channel 2 is accepted by the trigger bit 1. Enabled channel count is 4.
m=E−Emin=4−4=0,pass
Five enabled channels clear the policy floor
Candidate channel 2 is accepted by the trigger bit 1. Enabled channel count is 5.