That was the stuff of other lives, he was waiting for his to begin. He got in the habit of walking around the trailer and asking aloud, "Who knows?" … - Annie Proulx

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That was the stuff of other lives, he was waiting for his to begin. He got in the habit of walking around the trailer and asking aloud, "Who knows?" He said, "Who knows?" For no one knew. He meant, anything could happen. A spinning coin, still balanced on its rim, may fall in either direction.