Name: Cruel . Gender: Male or Female . Usage: Cruel is not a popular first name. It is more often used as a boy (male) or a girl (female) name. People having the name Cruel are in general originating from United States of America.
An earlier and less successful lie detector or polygraph machine was invented by James Mackenzie in 1902. However, the modern polygraph machine was invented by John Larson in 1921. John Larson, a University of California medical student, invented the modern lie detector (polygraph) in 1921. Used in police interrogation and investigation since 1924, the lie detector is still controversial among psychologists, and is not always judicially acceptable.
Although, this invention did help save hundreds of people's lives over the next 20 years. Alexander Graham Bell is most famous today for having invented the telephone, but he was also responsible for early versions of the phonograph, the metal detector, the audiometer (a hearing detector), the hydrofoil boat, and even a selenium-based battery.