[3/3] If you're actually familiar with the period, the majority of media which purports to be have a "realistic medieval setting" is doing that *all the time*.

[2/3] You know how annoyed you get when someone confidently asserts that [thing in your favourite media A] is a reference to [thing in your other favourite media B], but you know that can't possibly be true because A was published before B?

So that's where PMW2 got that trait from