Here are the current theories about Who Is Secretly a Robot.
Plus, there’s a poll at the bottom where you might weigh in too.
Backstories are used to ground the hosts.

Credit: John P. Johnson/HBO (4)
At one point Ford says, “I know how that head of yours works.”
Then again, how difficult would this be for a place like Westworld to fake on his behalf?
That’s one reason he’s able to effortlessly control all the other hosts.
He’s seeking The Maze, something that’s seemingly made for hosts.
He says he plans to never leave the park this time, just like the hosts.
Plus she’s questioned the decisions of her superiors.
Basically, we’re pretty sure Elsie is not a robot.
She doesn’t particularly like the park, or its guests.
Why He Isn’t a Robot:He’s too much of a jerk to be a robot!
Plus, writing is the one profession that’s safe from being replaced by artificial intelligence, right?
… Um, right?