What makes a machine learning paper reproducible?

From a blog post:

... we hear warnings that Artificial Intelligence (AI) and Machine Learning (ML) face their own reproducibility crises. This leads us to ask: is it true? It would seem hard to believe, as ML permeates every smart-device and intervenes evermore in our daily lives. From helpful hints on how to act like a polite human over email, to Elon Musk’s promise of self-driving cars next year, it seems like machine learning is indeed reproducible. How reproducible is the latest ML research, and can we begin to quantify what impacts its reproducibility?

https://thegradient.pub/independently-reproducible-machine-learning/