Talk:Armor/@comment-5139296-20120527004849/@comment-101.160.92.205-20120531044033

@WOB Silas:

Thanks for the clarification.

Summary:

Armor Penetration (Runes/FLAT) can only ever reduce to 0, where as some items (Such as The Black Cleaver) can lower below this point, therefore giving the <0 armor calculations above meaning.