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:
“I am already kindly disposed towards you. My friendship it is not in my power to give: this is a gift which no man can make, it is not in our own power: a sound and healthy friendship is the growth of time and circumstance, it will spring up and thrive like a wildflower when these favour, and when they do not, it is in vain to look for it.”
—William Wordsworth (1770–1850)
“Time is a very bankrupt and owes more than he’s worth to
season.
Nay, he’s a thief too: have you not heard men say,
That Time comes stealing on by night and day?”
—William Shakespeare (1564–1616)
“At one time or another, almost every politician needs an honest man so badly that, like a ravenous wolf, he breaks into a sheep-fold: not to devour the ram he has stolen, however, but rather to conceal himself behind its wooly back.”
—Friedrich Nietzsche (1844–1900)