Genetic Algorithms in Elixir: First stab at Ch1 algorithm converges just fine? (p28)

I’ve got something of the opposite of the usual problem - my code doesn’t fail in the way the text suggests it should (when it suggests premature convergence is the cause).

I’ve ran the code a fair bit and did some debug print injecting and such but I can’t really see anything out of the ordinary - it converges on the correct answer almost instantly if I run it without any additional debug and it takes a reasonable amount of generations from what I can tell by poking at it.

Now I am clear to continue the chapter as-is, and I understand the argument being made, but I don’t understand how the algorithm is meant to fail (I do in the abstract but I mean the code as written) and that’s bugging me.