Talk:Armor penetration/@comment-60.241.118.81-20120731134728/@comment-59.180.7.63-20120801161613

That doesnt make sense ProtonZero. Once Slice (with fury, at max rank) is applied against a target with 100 armor, for the next four seconds the armor is considered to be 65 (and it shows so). Black Cleaver starts the reduction after the first auto-attack. This means that on the fourth hit (provided this all happens in 4 seconds), the armor will, for all practical purposes be 65-45 = 20.

Black cleaver takes the current value of armor into consideration, which, after the Dice debuff will be 65. You are claiming that it takes only the original value of armor in calculations to be followed.

The previous poster did the correct math.

The poster clearly mentioned he used the ability before the auto attacks from his W.