The Hacker News algorithm is suboptimal

List all HN posts ever. Group by URL - i.e. find the re-posts. Select the groups where the re-posts got more votes. Some of those will have radically more votes. Under an efficient algorithm, This demonstrates sub-optimality.

https://twitter.com/ianmiell/status/1089560766758486017

What can computers do? What are the limits of mathematics? And just how busy can a busy beaver be? This year, I’m writing Busy Beavers, a unique interactive book on computability theory. You and I will take a practical and modern approach to answering these questions — or at least learning why some questions are unanswerable!

It’s only $19, and you can get 50% off if you find the discount code ... Not quite. Hackers use the console!

After months of secret toil, I and Andrew Carr released Everyday Data Science, a unique interactive online course! You’ll make the perfect glass of lemonade using Thompson sampling. You’ll lose weight with differential equations. And you might just qualify for the Olympics with a bit of statistics!

It’s $29, but you can get 50% off if you find the discount code ... Not quite. Hackers use the console!

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