Some people think that ovens can be "self-cleaning". I beg to differ. Ovens require the user to lock the oven door closed, twist knobs or push buttons, wait, and then wipe out the charred results.

No, the real example of "self-cleaning" can be seen in the noble domestic cat. A cat will clean itself from top to bottom with its tongue and paws, finishing tidy and free from squallor.

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