Missing Fundamentals?

I am a masters student who has worked on a bit of Machine Learning. I have taken up masters level courses in ML and achieved good grades. But when I write up ML code (not using sklearn or inbuilt functions), like building a loss function, I miss out on details like considering if the function is differentiable in the first place. I seems stupid, I mean I know it should be differentiable, but it did not strike me. I make …

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