Theory:Doctor Who television discontinuity and plot holes/The Girl Who Died


 * If the Mire are strong warriors and have a device that "repairs" them continuosly, it's unlikely that they are firghtened by a bad CGI monster (and when they see that the monster is not affected by their weapons, it's unlikey that they don't recognize their own hologram technology). Indeed, it's strange that the Mire don't rule the universe yet - or at least the galaxy - with immortality devices so cheap that every soldier has one in their helmets! (Ok, ok, we know for sure that at least two soldiers have them in the helmet, we don't know about other soldiers). The same thing could be said for the Chula, which we never see on screen, warriors that have nanogenes that cure everything and bring the dead back to life!
 * Ashildr mentions corn, which only existed in the Americas at the time and wasn't imported to Europe until after the discovery of the new world.
 * In English, the word "corn" means "The main cereal plant grown for its grain in a given region, such as oats in parts of Scotland and Ireland, and wheat or barley in England and Wales." - the word corn actually comes from Old English. So the word is correctly used.


 * Electric Eels are native only to the Amazon
 * Both are correct but we don't take the real world into account here: http://tardis.wikia.com/wiki/Tardis:Valid_sources#The_real_world_doesn.27t_count
 * Although no one has brought it up yet, the above also applies to the fact that in real life Vikings didn't wear horned helmets as seen here.