Just finished re listening to the Purgatory chapter about Datu, Angel and Riley's adventure into the arena.

When Angel and Riley finally find the room Datu is in the door is locked on the outside, they go into the room next to it and find the hole Datu and Samantha made. And obviously Datu can't get out because it is locked on the inside too. So how do the zombies open the door to pick the next victim for the pit? Do they use a key?

We hear in Ch 1 when Michael, Angel and Saul lock themselves in the gun vault that they left the key in the door outside but none of the biters noticed or could figure it out.

Does this point to the evolutution of logic and cognitive abilities in the biters getting stronger? Are the ones in the Arena just some of the 'smart ones' and this part of Ink's close entourage? Or is it just a meaningless oversight in the story and isn't intended to be anything more than a reason to use the hole in the wall they worked so hard to make?

Interesting thoughts...