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A quick reminder if you got here from one of our online courses:
There are 8 articles in "Foundations" course, four about the "Problems" and four about the main "Solutions"-categories. .
In the advanced course "Proposals" there are 21 articles, exclusively about the specialised topics under in the "Solutions" categories (click on + in the side-bar to find those). There are no advanced articles in the "Problems"-categories.