They're typically not coders as a background. They're usually a hard science/math person so they didn't get variable indoctrination. I haven't coded a NN since

They're typically not coders as a background. They're usually a hard science/math person so they didn't get variable indoctrination. I haven't coded a NN since grad school and just scanning over the code I can tell this is basically the same as what I did. No doubt this is a boiler plate approach compiled into an article.