Yes, I think you are right. Badly phrased. You can nest the volumes. So give attacker A-->B-->C instead of A-->D-->E Also, there is no way of proving the exist

Yes, I think you are right. Badly phrased. You can nest the volumes. So give attacker A-->B-->C instead of A-->D-->E Also, there is no way of proving the existence of a hidden volume. It basically makes the Rubberhose attack unreliable as an attack vector. That doesn't mean some poor soul won't be beaten again, it just means that the folks doing the beating aren't so sure this $5 wrench is a decent attack vector.