*alternate universe* me: in topology, right, there are sets called "open" and also "co-open", but the wild thing is that a set can be both -- or neither! you: yeah. doesn't seem that weird based on the definitions. it'd be different if the words were semantically loaded i guess
Replying to @PRDGM1
Topological openness and closeness is still perfectly consistent with the behaviour of doors (for exotic doors, as for exotic topologies) [door due to Duchamp]pic.twitter.com/5soKRtxRy6
7:29 AM - 12 Jan 2020
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