_"You aren't human, Bell. And you're not a robot. What are you?" Bell pondered the query slowly, cautiously, with his semi-mechanical superbrain ... a brain that Plutonians dubbed the most deadly and dangerous in the universe._ [Transcriber's Note: This etext was produced from Planet Stories May 1953. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.]…
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