The last recourse of a "Jeopardy!" contestant who blanks on an answer, apparently, is to respond with his or her own name. I'd imagine the success rate of such a strategy is less than 0.000001% (although it's around 35% if you're an obscure 19th-century playwright). Here, we see Kareem Abdul-Jabbar demonstrating this classic approach.
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Ouch. On the bright side, at least it's not the worst "Jeopardy!" response ever.