With sophisticated prosthetics, new performance enhancing drugs, and complicated questions of gender, deciding who can compete is a tricky issue.
<p> Who can compete in the Olympic Games? For much of the 20th century, the answer was pretty straightforward: You had to be an amateur athlete and you couldn't be drunk. These days, with new performance enhancing substances, sophisticated prosthetics, and myriad ways of determining gender, the issue is considerably more complicated.</p>
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