Hangul supremacy
Hangul supremacy is the belief, most widespread in Korea, that the Hangul alphabet developed by King Sejong the Great's Hall of Worthies in 1443 is the simplest, most logical, most beautiful and most scientific of the world's writing systems. In its extreme form, the belief holds that Hangul is in fact best suited for the expression of sounds in all languages.
Hangul
The Korean neutral vowel was "i". The "yin" vowels were "eu, u, eo"; the dots are in the "yin" directions of 'down' and 'left'. The "yang" vowels were "ə, o, a," with the dots in the "yang" directions of 'up' and 'right'. The "Hunmin Jeong-eum Haerye" states that the shapes of the non-dotted letters were chosen to represent the concepts of "yin", "yang", and mediation: Earth, Heaven, and Human. (The letter "ə" is now obsolete except in the Jeju language.)