I feel for the guy (even though it was completely the wrong forum to complain about that). I'm in a French Duolingo group with a friend from Sri Lanka. He speaks English quite clear, but his accent causes most of the vocal challenges on Duolingo to mark him as incorrect. Though his pronunciation... c'est tres terriblé.
Netflix-style machine learning is really interesting, and surprisingly not that hard! I went to a forum recently with professors proposing block-chain management of newly published literature. It's an interesting concept because it would make citations and pre-requisite readings traceable almost back to first principles.
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