Some have suggested this must degradation must happen with the information itself too, rather than just the pages of the book. Eventually, as it crumbled, we'd have ourselves a paradox again, with nowhere for young Bob to get the information in the first place. The book would, obligingly, follow the law that systems flow from a state of order to one of disorder, and eventually crumble as it made its way forwards and backwards in time. Say Bob had not copied the information across to a new book, but had sent the same physical book back in time. Heinlein See Customer Reviews Select Format Hardcover 8.99 - 14.49 Paperback 4.79 - 5. The law of entropy also poses a problem for versions of the loop, such as when a physical object is involved. Heinlein Science Fiction & Fantasy Books > Space Books ISBN: 0544336267 The Giver: A Newbery Award Winner (Giver Quartet, 1) (Book 1 in the The Giver Series) by Robert A.

Nevertheless, there are a few problems in ' closed causal loops' as they are sometimes termed, in that they appear to show something in the future affecting the past. Unlike the Grandfather Paradox – where you go back in time and kill your own grandfather, making it impossible for you to have been born to grow up and kill your own grandfather – the Bootstrap Paradox is self-consistent, and can't be undone with its own internal logic alone. Heinleins short story All You Zombies follows a protagonist who, as the result of a time-travel paradox, is his own mother, father, and child. A more recent example of the Bootstrap Paradox is in the Terminator movies, where the artificial intelligence Skynet learns how to create Terminators after one comes back to the past and dies, meaning it can be studied.

Heinlein time travel