What exactly is a “sixth sense”?
‘Sixth sense’ is the colloquial term for the faculties of ‘extra-sensory perception’ (ESP). Sixth sense is the ability to receive or send information beyond the realm of the five canonical senses (taste, sight, touch, smell, and hearing), or any other sense well known to science (balance, proprioception, etc). The term ‘sixth sense’ was coined by German researcher Dr. Rudolf Tischner whose book “Telepathy and Clairvoyance” was written in German in 1920 and published in English in 1925. Because the definition of sense is vague, the precise definition of extra-sensory is as well, but the term is generally used in reference to humans, to imply sources of information unknown to modern science. http://en.wikipedia.
