PARADOX

I love the beauty of this statement :

I always lie is a paradox because if its true it must be false .. 

Here are a few paradoxes related to TIME :

• 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.
• Ontological paradox: Can a time traveler send himself information with no outside source?
• Predestination paradox^[6]: 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 ontological 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?

 Refer wikipedia for more