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Why You Should Test Everything and How To Do It — Osman Mansur, Duolingo

Sub Club by RevenueCat

CHAPTER

The Big Critique of A.B. Testing

There's a big critique of test driven design as like a failed. Duolingo has an A.B. testing system so dialed that it sounds like as on rails and powerful as what you all have. Even if an experiment is a winner for our top line metrics, we will still have a discussion around whether in the long term this fits into our roadmap or whether it makes sense for the UX. The words we hear the most from our CEO, Luis, is only launch this if it's a big win.

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