/u/Darkblitz9 disagrees with you
That is not true. Double Damage applies only to hit damage, so does not double the damage of damaging ailments, but it does affect the hit damage, which is what is used to calculate non-damging ailments.
Just for clarification. Is stun a non damaging ailment? I was always under the impression that double damage helps stun, but I would love some definitive answer.
Stun is not an ailment at all, it's just a thing some hits do, but stun chance is based on damage dealt, so doubling damage increases the likelihood of stun