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La fine dell'eternità

By Isaac Asimov, Giuseppe Lippi (Translator), Giuseppe Lippi (Preface)

(1308)

| Paperback | 9788804414513

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Book Description

In un futuro ancora molto lontano l'uomo ha imparato a viaggiare nel tempo, spostandosi con disinvoltura da un secolo all'altro e organizzando traffici commerciali tra ere diverse. Il viaggio nel tempo permette anche di tenere l'umanità sotto rigido controllo, modificando tutto ciò che potrebbe provContinue

In un futuro ancora molto lontano l'uomo ha imparato a viaggiare nel tempo, spostandosi con disinvoltura da un secolo all'altro e organizzando traffici commerciali tra ere diverse. Il viaggio nel tempo permette anche di tenere l'umanità sotto rigido controllo, modificando tutto ciò che potrebbe provocare gravi turbamenti nella storia. A effettuare i cambiamenti sono delegati gli analisti e i tecnici della chiusa casta degli Eterni, gli unici in grado di manipolare passato e futuro. Un giorno però Andrew Harlan, un giovane Eterno, si trova di fronte ad una scelta atroce: salvare l'eternità o il suo amore, e non avrà dubbi. Uno dei più brillanti romanzi di Isaac Asimov, una sconcertante epopea che si pone come alternativa possibile all'universo dei robot, dell'Impeto Galattico e della Fondazione

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    "Consider how helpless the Primitives must be. They worry about a man killing his own grandfather because they do not understand the truth about Reality.

    Take a more likely and a more easily analyzed case and let’s consider the man who in his travels through time meets himself...and the four sub ... (continue)

    "Consider how helpless the Primitives must be. They worry about a man killing his own grandfather because they do not understand the truth about Reality.

    Take a more likely and a more easily analyzed case and let’s consider the man who in his travels through time meets himself...and the four subdivisions into which such an act can fall. Call the man earlier in physiotime, A, and the one later, B.

    Subdivision one, A and B may not see one another, or do anything that will significantly affect one another. In that case, they have not really met and we may dismiss this case as trivial.

    Or B, the later individual, may see A while A does not see B. Here, too, no serious consequences need be expected. B, seeing A, sees him in a position and engaged in activity of which he already has knowledge. Nothing new is involved.

    The third and fourth possibilities are that A sees B, while B does not see A, and that A and B see one another. In each possibility, the serious point is that A has seen B; the man at an earlier stage in his physiological existence sees himself at a later stage.
    Observe that he has learned he will be alive at the apparent age of B. He knows he will live long enough to perform the action he has witnessed. Now a man in knowing his own future in even the slightest detail can act on that knowledge and therefore changes his future.

    It follows that Reality must be changed to the extent of not allowing A and B to meet or, at the very least, of preventing A from seeing B. Then, since nothing in a Reality made un-Real can be detected, A never has met B.

    Similarly, in every apparent paradox of Time-travel, Reality always changes to avoid the paradox and we come to the conclusion that there are no paradoxes in Time-travel and that there can be none."

    Almeno così la pensa Sennor, ma Harlan non ne è poi tanto sicuro...

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    Ignatius Reilly said on Mar 6, 2010 | 1 feedback

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