The area's bears like to use the pineboard sides of the hide as a scratching post when humans are not around.

BBC: Qu��bec's wood runners

Considering that the entire futuristic Korean story is performed by its characters in plain English, and that we have no reason to believe that these later post-apocalyptic humans would even incorporate English into their own language, it feels less like a world-building method, and more like the writers being unnecessarily clever.

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The post also showed why humans are needed to comb through posts.

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Eventually, enough brain cells die for the tell-tale gaps to appear in the tissues, although the only way of definitively confirming a CJD case in humans is following death during post mortem.

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