Senses used by mental mediums are sometimes defined differently from in other paranormal fields. A medium is said to have psychic abilities but not all psychics function as mediums. The term clairvoyance, for instance, may include seeing spirit and visions instilled by the spirit world. The Parapsychological Association defines "clairvoyance" as information derived directly from an external physical source.
The British medium Francis Ward Monck was investigated by psychical researchers and discovered to be a fraud. On November 3, 1876 during the séance a sitter demanded that Monck be searched. Monck ran from the room, locked himself in another room and escaped out of a window. A pair of stuffed gloves was found in his room, as well as cheesecloth, reaching rods and other fraudulent devices in his luggage. After a trial Monck was convicted for his fraudulent mediumship and was sentenced to three months in prison. https://drive.google.com/file/d/1daHqn0IeY5p0VYJH2JxmL05muXLeMGc8/view?usp=sharing
"Mental mediumship" is communication of spirits with a medium by telepathy. The medium mentally "hears" (clairaudience), "sees" (clairvoyance), and/or feels (clairsentience) messages from spirits. Directly or with the help of a spirit guide, the medium passes the information on to the message's recipient(s). When a medium is doing a "reading" for a particular person, that person is known as the "sitter". https://drive.google.com/file/d/1GEKx89qSKkJWI3i0M9kXg4Jy6OlYi_Qz/view?usp=sharing
Twin flames is a spiritual concept and is the strongest spiritual connection that can occur between two people. Twin flames are believed to occur when a single soul is divided. This separation of twin flames causes some to refer to your twin flame as being the other half of your soul, as you, in turn, are the other half to theirs. Others, however, say that each twin flame is a complete soul in and of itself but that it is a perfectly matched mirror to its counterpart. A twin flame will also be a soulmate, though a soulmate is not always a twin flame. You can only have one twin flame.