Premise: John Glenn . He was one of the Mercury Seven , military test pilots selected in 1959 by NASA as the United States ' first astronauts . He received the NASA Distinguished Service Medal , the Congressional Space Medal of Honor in 1978 , was inducted into the U.S. Astronaut Hall of Fame in 1990 , and was the last surviving member of the Mercury Seven .
Hypothesis: John Glenn was not one of the Mercury Seven.
Label: CONTRADICTION