A BIG Clarity Problem In LoL

In League there are things that bonus or are modified by bonus stats (such as bonus attack damage/armor/magic resistance) and then there are things that bonus or are modified by an entire stat. The difference between the two is pretty big in game but the difference in wording is VERY easy to overlook and a lot of newer players don't realize there's a difference at all.

A very common problem this causes involves using the talent Enchanted Armor. A LOT of newer players take this talent because they think it applies to the base armor and magic resistance their champion starts with and gains from levels. I've seen numerous players using it with champions who buy 0 armor or magic resist items. Some players don't know if armor and MR from runes and other masteries are considered 'bonus' or not.

I was going to talk about possible solutions but honestly Riot is more than capable of figuring out how best to highlight a word explain what it means.

Do you know how multiple sources of tenacity math out or how they work with 's W or 's passive?

What clarity issues have you guys run into?