Precognition (from the Latin 'before', and 'acquiring knowledge') is the purported psychic phenomenon of seeing, or otherwise becoming directly aware of, events in the future. There is no accepted scientific evidence that precognition is a real effect, and it is widely considered to be pseudoscience. Precognition violates the principle of causality, that an effect cannot occur before its cause. Precognition has been widely believed in throughout history. Despite the lack of scientific evidence, many people believe it to be real; it is still widely reported and remains a topic of research and discussion within the parapsychology community. Precognitive phenomena Precognition is sometimes treated as an example of the wider phenomenon of prescience or foreknowledge, to understand by any means what is likely to happen in the future. It is distinct from premonition, which is a vaguer feeling of some impending disaster. Related activities such as predictive prophecy and fortune telling have been practised throughout history. Precognitive dreams are the most widely reported occurrences of precognition. Usually, a dream or vision can only be identified as precognitive after the putative event has taken place. When such an event occurs after a dream, it is said to have "broken the dream". In religion In Judaism it is believed that dreams are mostly insignificant while others "have the potential to contain prophetic messages". Hinduism has a subsystem of psychology called Indian psychology with dreams believed to contain information about the future. There are seven classifications of dream or 'swapna', in which those which become 'manifest' are called 'bhāvita'. Precognition has a role in Buddhism with dreams believed to be 'mind-created phenomena'. Those dreams which 'warn of impending danger or even prepare us for overwhelming good news" are considered the most important. History Throughout history it has been believed that certain individuals have precognitive abilities, or that certain practices can induce such experiences, and these visions have sometimes been associated with important historical events. Despite the lack of scientific evidence, many people still believe in precognition. A poll in 2005 showed 73% of Americans believe in at least one type of paranormal experience, with 41% believing in extrasensory perception. Antiquity Since ancient times precognition has been associated with dreams and trance states as well as waking premonitions, giving rise to acts of prophecy and fortune telling. Oracles, originally seen as sources of wisdom, became progressively associated with previsions of the future. Such claims of