Quote Originally Posted by Donjo View Post

Because damage reduction is equivalent to having more HP, claiming that one is mitigation and that the other is not is a contradiction. It's basic logic.
If the damage is received at 100% of its intended value then no damage has been mitigated. Just because you have more health, the damage may be less severe, and you can incorrectly use the word mitigated, but you never really mitigated any damage at it was received in full. You just have more hp to absorb the full value of damage.

I take 1k hit with no mitigation I lose 1k health. Mitigation allows you to reduce the amount of damage received.
I use sentinel, take a 800 damage, 20% of the hit was mitigated.

both of those combined is our eHP. HP/(1- (mitigation/100)) eHP is the combination of both hp and mitigation.