And don't you think it was designed to be confusing. Really, you need to look into Alexander Graham Bell who created sign language. He believed in Eugenics and lived in Martha's Vinyard witch is a known occult area.
"Like his father, Alexander Melville Bell, Alexander became a teacher and later an authority on elocution and speech correction and promoted his father's technique of ‘Visible Speech’. In 1871, he accepted a position to teach at the Boston School for Deaf Mutes for a year then began tutoring deaf children. Mabel Hubbard, one of Bell’s former students married Bell on July 11, 1877. He was also a long time friend of Helen Keller's. While in Boston, Bell established a private school (1872), and worked as a professor of vocal physiology at the School of Oratory at Boston University. He also invented many instruments to help deaf people hear or feel speech. In 1876, Bell developed the electric telephone.
Bell was heavily involved in American eugenics. He researched the genealogy of deaf-mute families in Martha's Vineyard in the early 1880s (Engs, 2003). He also began breeding experiments on sheep while living in Nova Scotia in 1889 (Engs, 2003). He joined the American Breeders Association, which was involved in the American eugenics movement, and served on the Committee on Eugenics for the American Breeders Association, and eventually he headed the Committee on Deaf Mutism (Engs, 2003 ; Biographiq, 2008).
Bell was also involved with eugenics on an international level - he helped organized the First International Conference on Eugenics (1912), and was honorary president of the Second Conference in 1921 (Engs, 2003 ; Biographiq, 2008). He participated with the Eugenics Record Office in the United States as chairman on the board, and helped guide research carried out by the association (Engs, 2003). He also regularly attended meetings held by the Eugenics Board (Biographiq, 2008)"
http:// eugenicsarchive.ca/discover/connections/512eed4734c5399e2c000001