A Certain Ratio is a Post-punkband formed in 1977 in Manchester, England. While originally part of the punk rock movement, they soon added funk and dance elements to their sound. The band's name is taken from the lyrics of Brian Eno's song "The True Wheel" (from the album Taking Tiger Mountain (By Strategy), which in turn were taken from a quote from Hitler on the proportion of 'Jewish blood' that was required to determine whether someone was to be classified as 'Jewish'. There is some dispute as to whether the band were aware of the original meaning of the phrase.
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