Venkatesh Rao Retweeted Nitai
I call this sort of thing "Geometry for Universe Builders" (stolen from chapter title in https://books.google.com/books?id=LLEZQC74gVcC&lpg=PA449&ots=fx7twKg3iL&dq=edna%20kramer%20geometry%20for%20universe%20builders&pg=PA449#v=onepage&q=edna%20kramer%20geometry%20for%20universe%20builders&f=false … )https://twitter.com/thenitai/status/688417431811960833 …
Venkatesh Rao added,
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