Lol your a fag lol!. Any number of your theories could be correct since that all make since, but I'm sure by the time they release the next book they well explain it better. But if you remember int he books Humans are in fact superior since Cortana was able to ENHANCE the weapons on a Covy ship destroying the other ones with ease. Now imagine if Humans had a couple of ships with their brains in it, or in other words Cortana who was created by Human brains we would easily win the war, since our ships would be superior. Plus Chief is a superior species, or in other words Humans are superior to the Covies except the Covies had a deep passion to kill humans which was actualy because of the Prophets who played Elites as fools. I actualy have a nearly 100% for the real reason, but I well post it on later. Remember the crystal? Well the real reason why Covies want to destroy Earth is becuase WE have one, and they dont,and its Forerunners tech...See? Think about it. Frosty is a loser. Probaly has no girlfriend either lol.

The Cheif is not a separate species, hes human, just like the rest of us. The only difference is he had genetic and cybernetic enhancements. But the Covies are still more advanced even if they stole the technology. Our countries steal technology all the time, how do you think the nuclear weapon secrets got into all the 3rd world countries? It makes them more advanced than the ones that don't have the secrets.

Well it seems odd that Cortana is said to be far more advanced than any Covanent AI.

I never said Chief was a seperate species hes human. Still even if another human had better tech than another their still human just a seperate group. So when I say humans I mean every single one of them.