Hmmm, the minions probably did think the earth was flat since that's what the church told them. Definitely, most of the thinkers of that time knew it wasn't and were told to keep it hush hush or there would be harsh punishment. It's not a one size fits all kind of thing, and just like everything else, it's complicated.

Now you've got me curious, what do you think they didn't continue? The art wasn't the same, is that it? We should be very thankful they saved a lot of knowledge that could have been lost.