I failed this exercise because I made a typo. Not sure if course creators can control this or not, but the typo was 'literattur' vs the correct 'litteratur'. Usually little one-letter typos don't cause you to fail the whole exercise :(
That's true, but you actually made two typos from the system's point of view - first you missed a t, and then you put an extra t later on. So that causes it to fail. I mean, it's obvious what you meant to a human, but it's hard for a machine to spot things like that. And as you guessed, we can't affect it really.
Oh dang! That's really counterintuitive (at least to my organic brain, lol). Thanks for explaining!