Sadly, this is probably the truth. (from http://www.quartertothree.com/fp/2016/01/29/the-witness-is-a-puzzle-wrapped-in-a-puzzle-inside-a-puzzle/#comment-2486166348 …)pic.twitter.com/5w3TaiCXHi
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It does seem like it would be a useful primitive for some of the boundary regions where you're just saying "don't go past here".
that's what I thought when this happened to me. hindsight is 20/20, I guess
Well, mostly I think there was not really anyone in charge of / thinking about the next level of walk security.
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