You are comparing doing something with doing nothing, so it is quite likely that doing something gives better results than doing nothing. For a more fair and ba

You are comparing doing something with doing nothing, so it is quite likely that doing something gives better results than doing nothing. For a more fair and balanced comparison, you should compare the use of Duolingo with some other "methods" of language learning. For example, for learning new words, spaced repetition would give way faster results than using Duolingo