Corrected entry: Even though David is a robot, his carotid pulse can clearly be seen throbbing on the left side of his neck during the scene in which he was talking to his brother.
Corrected entry: At the flesh fair, when the little girl goes to her father to tell him that David is in the Mecha cage, on the monitors in the control room you can see the destruction of the robot who asked to have its pain receptors turned off. A few shots later, you see the robot still in the cage and then its actual destruction.
Corrected entry: Why was everyone so sure that Gigolo Joe murdered his client? He's a mecha so they could have gone through his memory files and would have found out he didn't do it.