Sui generis
In local government, a "sui generis" entity is one that does not fit with the general scheme of local governance of a country. For example in England, the City of London and the Isles of Scilly are the two "sui generis" localities, as their forms of local government are both (for historical or geographical reasons) very different from those of elsewhere in the country. 
In a press conference during which reporters were trying to analyse his political personality, Huey Long said, "...say that I am "sui generus", and let it go at that."
Social teachings of Pope Pius XII
In 1950, Pius XII promulgated "Humani generis" which acknowledged that evolution might accurately describe the biological origins of human life, but at the same time criticized those who use it as a religion, who "imprudently and indiscreetly hold that evolution... explains the origin of all things". While "Humani generis" was significant as the first occasion on which a pope explicitly addressed the topic of evolution at length, it did not represent a change in doctrine for the Roman Catholic Church. As early as 1868, Cardinal John Henry Newman wrote, "the theory of Darwin, true or not, is not necessarily atheistic; on the contrary, it may simply be suggesting a larger idea of divine providence and skill." The encyclical issues a clear no to another scientific opinion popular at the time, polygenism, "the scientific hypothesis that mankind descended from a group of original humans."