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What on earth is going on with Tesla? The stock skyrocketed, and then plummeted. And it still ended the day worth more than Toyota, Ford, and GM combined. This is partly because they make great cars, with great batteries, and could have a dominant position as the world transitions to electric automobiles. It’s partly because Elon Musk has been on better behavior recently---at least when not denying the effects of coronavirus. And it’s partly, well … just a crazy market with a lot of people betting in all directions.

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A story of algorithmic insanity. In lieu of in-person testing, the International Baccalaureate program used an opaque formula to determine students’ scores. Among other factors it depended on past results from students at the same school. This is not the way to run a crucial test that determines whether kids get into college.

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A new, very clever app, tries to unsubscribe you from spammy email while also getting you paid via class action lawsuits. And unlike other similar services, it isn’t based on privacy invasion.

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Rumor has it Twitter is launching a subscription service. This may well not be true, but if it is, it could fundamentally change how social networks operate, perhaps for the better.

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China’s new national security law in Hong Kong has put the big tech companies in a bind. Do they comply with it, and violate their principles of free speech? Do they resist, and face retaliation? Do they leave Hong Kong and lose a lot of business?

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