EE, that's more an Acceptable break from Reality. Many of the medieval ideas would make the characters look like gits or idiots to us, so that's one thing that can be passed up, as it's a general thing, not just from the middle ages.

Terra: On point 8, from a certain point of view, it was actually true. The middle ages were a brutal step back from the roman empire (The Library of Alexandria....How brutal and stupid can man be for religion and political power?), and there was a massive slowdown in the discovery of new things, and the rediscovery of previous ones. That said, it wasn't THAT static, of course. Humans change too rapidly for most things to hold from one century to another.