If the expression is true, the hardest problem in Computer Science would be naming cache invalidation strategies.
miniblog.
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Using Twitch to livestream computer science lectures is a really neat approach: https://composition.al/blog/2020/03/31/twitch-plays-cse138/
Gaming tools are pretty mature and work well!
"the satisfaction that I get out of building Envoy and working with the larger community is primarily driven by a desire to have huge industry impact and solve deep computer science problems. It’s not driven by maximizing my monetary income" https://twitter.com/mattklein123/status/875921591489576960
Ideological diversity producing better articles for Wikipedia articles about both politics and science:
https://m.nautil.us/issue/70/variables/wikipedia-and-the-wisdom-of-polarized-crowds