Potato chip gods and faces in the clouds

If you're out for a hike in the Sierra Nevada and in the distance ahead you make out an ambiguous object--could be an oddly shaped boulder, could be a snoozing Grizzly Bear--you'd be much better off erring on the side of the carnivorous 900-pound beast than the agglutination of phosphate...our brains have been hardwired to scan our surroundings for animals and other people.
And, I might add, to see them when they're not there.

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