"The term clairvoyance (from French clair meaning "clear" and voyance meaning "vision") is the alleged ability to gain information about an object, person, location or physical event through extrasensory perception. Any person who is claimed to have some such ability is said accordingly to be a clairvoyant ("one who sees clearly").
Claims for the existence of paranormal and psychic abilities such as clairvoyance have not been supported by scientific evidence published in high impact factor peer reviewed journals. Parapsychology explores this possibility, but the existence of the paranormal is not accepted by the scientific community. Parapsychology, including the study of clairvoyance, is an example of pseudoscience.
Pertaining to the ability of clear-sightedness, clairvoyance refers to the paranormal ability to see persons and events that are distant in time or space. It can be divided into roughly three classes: precognition, the ability to perceive or predict future events, retrocognition, the ability to see past events, and remote viewing, the perception of contemporary events happening outside of the range of normal perception."
From my point of view all of the above is demonic.