The acceptance gate accepts equality and rejects below-minimum coverage. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Equality at the minimum accepts

The minimum is 3x, and the accepted row computes exactly 3x.

333\ge3
Coverage acceptance gateUnique reads, read length, and genome size decide the exact coverage gate.unique=24readLength=50bases=1200genome=400coverage=3 xmin=3 xaccepted=1

Two-x coverage is below the same minimum

The rejected contrast uses 16 unique reads, giving 2x and accepted bit 0.

1650/400=2<316\cdot50/400=2<3
Coverage acceptance gateUnique reads, read length, and genome size decide the exact coverage gate.unique=16readLength=50bases=800genome=400coverage=2 xmin=3 xaccepted=0