Theory:Doctor Who television discontinuity and plot holes/The Zygon Inversion


 * Why are Clara and her copy using the pulse measuring method for detecting lying ? It is completely arbitrary and a good liar can easily hide it.
 * They're trying to manipulate each other. It's like Russian roulette except you have to guess who's bluffing.
 * Also, the circumstances here cannot really be compared to real life; Bonnie may indeed be able to tell if Clara is lying since they sort of share the same body.


 * Kate mispronounces "Zed" as "Zee" when she mentions Z-67.
 * In a British character played by a British actress on a British show it definitely looks weird. But since she is the head of Unified Inteligence Taskforce, she works with lots of different nationalities, not all of which respect the British pronunciation. She might have picked up a different idiosyncrasy from one of her colleagues. I do it all the time in my first language, whenever we meet some people from the oposide side of the country, I come back speaking as one of them, accent, inflection and everything.