TEXT 1. For answer question number 53- 56.

    A hoax, unlike an honest error, is a deliberately-concocted plan to present an untruth as the truth. It can take the form of a fraud, a fake, a swindle, or a forgery, and can be accomplished in almost any field: successful hoaxes have been foisted on the public in fields as varied as politics, Line religion, science, art, and literature.

    A famous scientific hoax occurred in 1912 when Charles Dawson claimed to have uncovered a human skull and jawbone on the Piltdown Common in southern England. These human remains were said to be more than 500,000 years old and were unlike any other remains from that period; as such, they represented an important discovery in the study of human evolution. These remains, popularly known as the Piltdown Man and scientifically named Eoanthropus dawsoni after their discoverer, confounded scientists for several decades.

    It took more than forty years for the hoax to be uncovered. In 1953, a chemical analysis was used to date the bones, and it was found that the bones were modern bones that had been skillfully aged. A further twist to the hoax was that the skull belonged to a human and the jaws to an orangutan.

56. In presenting the ideas, the author starts by ____.