I'm sorry, I'm completely aware that this has already been posted on the mechanics thread, but can someone put up a post about the mathematical formulas or mechanics at work here behind the dodge system? Or the theory it's related to?

It makes no sense, you get 10% dodge from runes, and then the ninja tabis give you a 11% dodge,

11+([100-11]x0.1)=19.9%

Where did the earlier 10% go?

There it is!

Your % to dodge does not combine together, they are taken seperately. (There's a list somewhere explaining which dodge factors take effect first.)

So, you 10% from runes and 11% from Tabi. Tabi goes first. An attack comes at you, you have a 89% chance to get hit, and an 11% chance to evade via Tabi. If the attack passes this check and hits you, then you do another check for the runes.... a 90% chance to get hit and a 10% chance to dodge.

If you try to express that with math, it looks like you have a (1 - .11)*(1 - .10) = 80.1% chance to get hit, and a 19.9% chance to dodge.

0_0" **** that's some complex maths... I'll try to work this out. I'm sure something in the compound interest section of maths will help me here to layout the foundation for the formula...

Either way Jax is rather op when you're playing an auto attack champion, and beyond that one that actually relies on your auto attacks for things, such as Warwick who NEEDS to hit to have any benefit of his lifesteal and beyond that his ulti.