my blog https://overreacted.io

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public/beyond-booleans/index.md
··· 419 420 ### P.S. 421 422 - If this got you curious about Lean, go play the [Natural Number Game](https://adam.math.hhu.de/#/g/leanprover-community/nng4)! At least for a few minutes. It's weirdly addictive, plus you already know how to solve [Level 0](https://adam.math.hhu.de/#/g/leanprover-community/nng4/world/Tutorial/level/0).
··· 419 420 ### P.S. 421 422 + If this got you curious about Lean, go play the [Natural Number Game](https://adam.math.hhu.de/#/g/leanprover-community/nng4)! At least for a few minutes. It's weirdly addictive, plus you already know how to solve Level 1.