Time
- Bootstrap paradox: Can a time traveler send himself information with no outside source?
- Predestination paradox: A man travels back in time to discover the cause of a famous fire. While in the building where the fire started, he accidentally knocks over a kerosene lantern and causes a fire, the same fire that would inspire him, years later, to travel back in time. The bootstrap paradox is closely tied to this, in which, as a result of time travel, information or objects appear to have no beginning.
- Temporal paradox: What happens when a time traveler does things in the past that prevent him from doing them in the first place?
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- Grandfather paradox: You travel back in time and kill your grandfather before he conceives one of your parents, which precludes your own conception and, therefore, you couldn't go back in time and kill your grandfather.
- Hitler's murder paradox: You travel back in time and kill a famous person in history before they become famous; but if the person had never been famous then he could not have been targeted as a famous person.
Read more about this topic: List Of Paradoxes
Famous quotes containing the word time:
“People who don’t know how to keep themselves healthy ought to have the decency to get themselves buried, and not waste time about it.”
—Henrik Ibsen (1828–1906)
“To give money to a sufferer is only a come-off. It is only a postponement of the real payment, a bribe paid for silence, a credit system in which a paper promise to pay answers for the time instead of liquidation. We owe to man higher succors than food and fire. We owe to man.”
—Ralph Waldo Emerson (1803–1882)
“the gap of today filling itself
as emptiness is distributed
in the idea of what time it is
when that time is already past”
—John Ashbery (b. 1927)