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In the last generation or so, the classic script of Babe Ruth, Harmon Killebrew and Rivera has largely deteriorated into a mess of squiggles and personal branding.

It is not just baseball, of course. The legible signature, once an indelible mark of personal identity, is increasingly rare in modern life. From President Obama, who sometimes uses an autopen, to patrons at a restaurant, few take the time to carefully sign their names.

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