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A comment on 500 days of Duolingo: What you can and can’t learn from a language app. Parent comment

Re:500 days of Duolingo: What you can and can’t learn from a... by Lerner_Adams on Saturday May 04, 2019 @08:50AM (#19826094)
Actually we can jump up a level directly with fewer than 4 mistakes. To take the level 4 test we only need to take three additional tests which would cost only about 20 minutes.
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