According to the magician John Booth the stage mentalist David Devant managed to fool a number of people into believing he had genuine psychic ability who did not realize that his feats were magic tricks. At St. George's Hall, London he performed a fake "clairvoyant" act where he would read a message sealed inside an envelope. The spiritualist Oliver Lodge who was present in the audience was duped by the trick and claimed that Devant had used psychic powers. In 1936 Devant in his book Secrets of My Magic revealed the trick method he had used.
Hmm. Believe Doug Ford, a politician with a high school degree, or George Akerlof Nobel Laureate EconomistRobert Aumann Nobel Laureate EconomistMartin Baily Former Chair, CEABen Bernanke Former Chair, Federal Reserve, Former Chair, CEAMichael Boskin Former Chair, CEAAngus Deaton Nobel Laureate EconomistPeter Diamond Nobel Laureate EconomistRobert Engle Nobel Laureate EconomistEugene Fama Nobel Laureate EconomistMartin Feldstein Former Chair, CEAJason Furman Former Chair, CEAAustan Goolsbee Former Chair, CEAAlan Greenspan Former Chair, Federal Reserve,Former Chair, CEALars Peter Hansen Nobel Laureate EconomistOliver Hart Nobel Laureate EconomistBengt Holmström Nobel Laureate EconomistGlenn Hubbard Former Chair, CEADaniel Kahneman Nobel Laureate EconomistAlan Krueger Former Chair, CEAFinn Kydland Nobel Laureate EconomistEdward Lazear Former Chair, CEARobert Lucas Nobel Laureate EconomistN. Gregory Mankiw Former Chair, CEAEric Maskin Nobel Laureate EconomistDaniel McFadden Nobel Laureate EconomistRobert Merton Nobel Laureate EconomistRoger Myerson Nobel Laureate EconomistEdmund Phelps Nobel Laureate EconomistChristina Romer Former Chair, CEAHarvey Rosen Former Chair, CEAAlvin Roth Nobel Laureate EconomistThomas Sargent Nobel Laureate EconomistMyron Scholes Nobel Laureate EconomistAmartya Sen Nobel Laureate EconomistWilliam Sharpe Nobel Laureate EconomistRobert Shiller Nobel Laureate
In 1936, the psychical researcher Nandor Fodor tested the Hungarian apport medium Lajos Pap in London and during the séance a dead snake appeared. Pap was searched and was found to be wearing a device under his robe, where he had hidden the snake. A photograph taken at a séance in 1937 in London shows the medium Colin Evans "levitating" in mid air. He claimed that spirits had lifted him. Evans was later discovered to be a fraud as a cord leading from a device in his hand has indicated that it was himself who triggered the flash-photograph and that all he had done was jump from his chair into the air and pretend he had levitated.
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.
In 1880 the American stage mentalist Washington Irving Bishop published a book revealing how mediums would use secret codes as the trick for their clairvoyant readings. The Seybert Commission was a group of faculty at the University of Pennsylvania who in 1884–1887 exposed fraudulent mediums such as Pierre L. O. A. Keeler and Henry Slade. The Fox sisters confessed to fraud in 1888. Margaret Fox revealed that she and her sister had produced the "spirit" rappings by cracking their toe joints.