Is this similar to what we call the "scientific method" in English? I believe it can be translated literally as (I think) "metodă științifică" (or "metoda științifică" if you want the definite form, as we tend to say "the scientific method") but I'm wondering if the two terms are equivalent.

I have a question: does anybody know ho many lessons this course has ? I reached level 19 and DUO tells me that the next level is 1500 points away. But I counted how many points are left with the remaining lessons of the tree and it is not even half this quantity !. Is the tree bigger than what appears on my laptop or am I supposed to start the tree again ? thanks