huinventors1-1, Exercise 2: An explanation and a doubt

Model answer:

Explanation: strong mathematics and science teaching in Budapest's secondary schools in the late nineteenth and early twentieth centuries produced a generation of talented students.

Doubt: it is hard to show that these schools were better than those in other countries, and the list of famous graduates is selected after the fact, so it may reflect who we remember. Also, many left Hungary for political reasons, which suggests migration, not only teaching, explains why they appear abroad.

Other explanations (the educated middle class, political upheaval, selection by the telling) can be used with their own doubts. Claims should be checked.