"Edward M. Lerner - Grandpa" - читать интересную книгу автора (Lerner Edward M)

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Copyright ┬й2001 by Edward M. Lerner

First published in Analog, July 2001


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The lecture hall was pleasantly warm. Behind professor Thaddeus Fitch, busily writing on the
chalkboard, pencils scratched earnestly in spiral notebooks, fluorescent lights hummed, feet shuffled. A
Beach Boys tune wafted in through open windows from the quad.

тАЬAnd so,тАЭ he continued, тАЬtravel backwards in time would violate causality, and hence appears to be
impossible.тАЭ He turned to face the class. тАЬThe problem is most commonly illustrated with the
тАШGrandfather Paradox.тАЩ

тАЬImagine that I had the technology with which to visit my grandfather in his youth. Once there, what is to
stop me from killing him before he'd had the opportunity to reproduce? But if I did succeed, who was it
who had traveled backward...тАЭ

A collective gasp interrupted his lecture. As Thaddeus realized that the students were all staring at his
chest, he glanced downward to see a red dot glowing on his white shirt. The professor next noticed, in
the back row of the hall, a young man who seemed to be aiming some sort of pistol at him. The would-be
sniper's hand seemed to shake in unison with the wobbling of the red spot.