silence-hole and coverage-hole are claims about the gate, and an ungated arm
never fires it, so classify labelled every ungated miss a coverage-hole by
construction. In the 48-trial run that padded the hole counts with five rows
that say nothing about the gate: coverage-hole read 7 when only 2 were the
gate's. Label an ungated miss unaided-miss, which is the baseline rate and is
excluded from the holes list.
montjeffrey
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