your assumptions and mine

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Assumptions are interesting and assumptions that receive a direct challenge from reality can be spooky. The ocean is inviting to swimmers during the hot summer days, but the book "Jaws" made it clear that the idea of being attacked by a shark is both unsettling and tantalizing. The books sold millions.

Then there is less dramatic stuff, as for example, the video of this Chinese woman falling through a sidewalk that anyone might assume was perfectly safe and not threatening at all.


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